General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website 39771 San Luis Obispo City City Agency 990 Palm Street San Luis Obispo, CA 93401 805-781-7239(+) mark@copelandproperties.com Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date 896173 Johnson Ranch Riparian Restoration Project San Luis Obispo 3 Dredge/Fill Site Owner 08/23/2024 null 890120 San Luis Obispo Creek Repair near Johnson Avenue Project San Luis Obispo 3 Dredge/Fill Site None null null 851052 Laguna Lake Sediment Management Program San Luis Obispo 3 Dredge/Fill Site Owner 09/18/2018 null 826571 San Luis Obispo City WS San Luis Obispo 3 Utility Structure Owner and Operator 07/25/2016 null 821919 Calle Joaquin Siphon and Lift Station Replacement Project San Luis Obispo 3 Dredge/Fill Site Owner 02/10/2016 null 810809 34014WQ21 Prefumo Creek Sediment Removal San Luis Obispo 3 Dredge/Fill Site Owner 11/20/2014 null 810808 34014WQ22 San Luis Obispo Creek Sediment Removal San Luis Obispo 3 Dredge/Fill Site Owner 11/20/2014 null 808934 34014WQ16 Broad Street Bank Stabilization San Luis Obispo 3 Dredge/Fill Site Owner 09/03/2014 null 795357 Andrews Creek Bypass storm Drain Improvements Project, San Luis Obispo Cnty San Luis Obispo 3 Dredge/Fill Site Owner 06/11/2013 null 783601 Higuera Street Storm Drain Culvert Repair San Luis Obispo 3 Dredge/Fill Site Owner 07/17/2012 null 783536 Cty of San Luis Obispo Creek Maintenance Annual Work Plan San Luis Obispo 3 Dredge/Fill Site Owner 07/16/2012 null 782234 Storm Drain Repairs at Various Locations Phase 1 Spec. No. 91307 San Luis Obispo 3 Dredge/Fill Site Owner 06/18/2012 null 778661 Motel Inn Sewer Line Temporary Armoring San Luis Obispo 3 Dredge/Fill Site Operator 03/14/2012 null 772866 Sediment Removal in San Luis Obispo Creek and Perfumo Creek Bypass Channels San Luis Obispo 3 Dredge/Fill Site Operator 11/08/2011 null 767724 City of San Luis Obispo Sediment Removal Project - SLO Creek at Marsh and Prefum San Luis Obispo 3 Dredge/Fill Site Operator 06/22/2011 null 767722 City of San Luis Obispo Silt Removal Project - Prefumo at Madonna San Luis Obispo 3 Dredge/Fill Site Operator 06/22/2011 null 716472 City of SLO Cleanup Sites on Tank Farm Road San Luis Obispo 3 Service/Commercial Site, NEC Owner and Operator 04/25/2013 null 637513 San Luis Obispo City Water Distribution System San Luis Obispo 3 Utility Structure None null null 633101 Recycled Water Flushing San Luis Obispo 3 Facility None null null 631748 San Luis Obispo CS San Luis Obispo 3 Collection_System Owner 04/06/2006 null 602576 San Luis Obispo City Reservoir Number 1 Pipeline Project San Luis Obispo 3 Facility Owner 09/09/2005 null 271808 San Luis Obispo Water Reclamation Facility San Luis Obispo 3 Wastewater Treatment Facility Owner 10/24/2003 null 255380 San Luis Obispo WWTP San Luis Obispo 3 Wastewater Treatment Facility Owner 07/26/1994 null 255379 San Luis Obispo Municipal SW San Luis Obispo 3 MS4 Owner 06/17/2005 null 247437 Palm Street Dewatering San Luis Obispo 3 Facility Owner 01/15/2004 null 232660 Irrigation Wells San Luis Obispo 3 Facility Owner 12/09/2002 null 201054 SLO City Aquatic Pesticides San Luis Obispo 3 Waterway/Shoreline Site Owner 08/06/2002 null Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification 213794 Patti Gwathmey Person Legally Responsible Official 04/24/2007 12/12/2007 null 144711 Jim Autry Person Employee 10/01/2004 01/01/2008 null 550892 Benjamin Marquart Person Data Submitter 04/22/2015 05/01/2015 null 375125 Bud Nance Person Legally Responsible Official 04/24/2007 07/20/2018 null 375126 Daniel Goulet Person Legally Responsible Official 04/24/2007 07/20/2018 null 523932 Howard Brewen Person Legally Responsible Official 07/27/2010 07/20/2018 null 303590 Aaron Floyd Person Employee 03/19/2008 07/25/2018 null 303590 Aaron Floyd Person Legally Responsible Official 03/09/2006 07/25/2018 null 303581 Anne Fairchild Person Data Submitter 03/09/2006 03/04/2019 null 550892 Benjamin Marquart Person Legally Responsible Official 05/01/2015 09/04/2019 null 549942 Christina Claxton Person Data Submitter 02/03/2015 11/06/2019 null 562996 Jeremy Gearhart Person Legally Responsible Official 03/28/2017 06/23/2021 null 630624 Ryan Beech Person Legally Responsible Official 02/08/2022 04/16/2026 null 584394 Robert Hill Person Legally Responsible Official 09/18/2018 null null 625699 Patrice Parsons Person Data Submitter 06/22/2021 null null 551631 Mitchell Plum Person Data Submitter 06/10/2015 null null 581491 Christopher Lehman Person Legally Responsible Official 07/31/2018 null null 303826 Joe O'Donnell Person Data Submitter 03/10/2006 null null 633756 Jill Rose Person Data Submitter 06/13/2022 null null 610331 Jarrett Rucker Person Legally Responsible Official 07/01/2020 null null 98474 David Hix Person Employee 04/06/2006 null null 540886 Matt Horn Person Legally Responsible Official 06/11/2013 null null 601717 Andrew Mora Person Legally Responsible Official 09/10/2019 null null 624526 Bryan Chen Person Data Submitter 05/19/2021 null null 594827 James Austin Person Data Submitter 02/13/2019 null null 303832 Matthew Anderson Person Legally Responsible Official 08/04/2025 null null 639319 Keith Schwanemann Person Data Submitter 05/08/2023 null null 303832 Matthew Anderson Person Data Submitter 03/10/2006 null null 541114 Manuel Guzman Person Legally Responsible Official 11/20/2014 null null 549942 Christina Claxton Person Legally Responsible Official 11/06/2019 null null 632749 matthew stiles Person Data Submitter 04/26/2022 null null 556578 Mychal Boerman Person Legally Responsible Official 05/31/2016 null null 98474 David Hix Person Employee 07/26/1994 null null 629887 Patrick McGrath Person Legally Responsible Official 01/19/2022 null null 554724 Marcus Henderson Person Legally Responsible Official 02/25/2016 null null 554602 Jennifer Metz Person Legally Responsible Official 02/10/2016 null null 646867 Lucia Pohlman Person Legally Responsible Official 08/23/2024 null null 642955 John Huggins Person Legally Responsible Official 12/13/2023 null null 623910 Christopher Duncan Person Data Submitter 04/29/2021 null null 622541 Daren Kersey Person Legally Responsible Official 03/17/2021 null null 554894 Tyler Lee Person Data Submitter 01/06/2022 null null 535208 Dan Van Beveren Person Legally Responsible Official 07/16/2012 null null 558262 Donald Thomas Person Employee 07/25/2016 null null 534490 Freddy Otte Person Legally Responsible Official 06/18/2012 null null Regulatory Measures(non-enforcement) Reg. Measure ID Regulatory Measure Type Region WDID Title Status Program Order No. RM Effective Date RM Termination Date Relationship Relationship Start Date Relationship End Date 132348 WDR 3 3 400309097 WDR & Rec Reqrmnts R3-2003-081 City of San Luis Obispo (Producer/User) Active WDRMUNILRG R3-2003-0081 10/24/2003 null Discharger 10/24/2003 null 143665 NPDES Permit 3 3 400107001 NPDES 85-021 for SAN LUIS OBISPO, CITY OF Historical NPDMUNILRG 85-021 02/08/1985 01/10/1986 Discharger 02/08/1985 null 131511 NPDES Permit 3 3 400107001 NPDES R3-2002-0043 for SAN LUIS OBISPO, CITY OF WWTP Historical NPDMUNILRG R3-2002-0043 05/31/2002 03/24/2005 Discharger 05/31/2002 null 144202 NPDES Permit 3 3 400107001 NPDES 90-012 for SAN LUIS OBISPO, CITY OF Historical NPDMUNILRG 90-012 04/13/1990 10/13/1995 Discharger 04/13/1990 null 456704 NPDES Permit 3 3 400107001 NPDES R3-2024-0001 for City of San Luis Obispo Water Resource Recovery Facility Active NPDMUNILRG R3-2024-0001 09/01/2024 null Discharger 04/24/2024 null 146994 NPDES Permit 3 3 400107001 NPDES 95-048 for SAN LUIS OBISPO, CITY OF Historical NPDMUNILRG 95-048 10/13/1995 05/30/2002 Discharger 10/13/1995 null 143462 NPDES Permit 3 3 400107001 NPDES 86-063 for SAN LUIS OBISPO, CITY OF Historical NPDMUNILRG 86-063 01/10/1986 04/13/1990 Discharger 01/10/1986 null 261358 NPDES Permit 3 3 400107001 NPDES R3-2002-0043 MOD for SLO City WWTP Historical NPDMUNILRG R3-2002-0043 MOD 03/25/2005 11/30/2014 Discharger 01/16/2007 null 399576 NPDES Permit 3 3 400107001 NPDES R3-2014-0033 for San Luis Obispo City WWTP Historical NPDMUNILRG R3-2014-0033 12/01/2014 08/31/2024 Discharger 01/23/2015 null 344344 Enrollee - Waiver 3 3 400408186 Enrollee-Waiver for Specific Disch Types for City of SLO Tank Farm Rd Active WDRNONMUNIPRCS R3-2026-0032 03/21/2008 null Discharger 04/24/2008 null 407879 Enrollee - NPDES 3 4DW0125 Enrollee - NPDES under Order 2014-0194-DWQ Drinking Water System Discharges for San Luis Obispo City Active NPDNONMUNIPRCS 2014-0194-DWQ 07/01/2016 null Discharger 07/01/2016 null 454149 Enrollee - 401 Certification 3 34023WQ36 Enrollee - 401 Certification for San Luis Obispo City Active CERFILLEXC 2018-0029-EXEC 10/31/2023 null Discharger 08/31/2023 null 458179 Enrollee - 401 Certification 3 34024WQ26 Enrollee - 401 Certification for San Luis Obispo City Active CERREST SB12006GN 10/07/2024 null Discharger 08/23/2024 null 261519 Enrollee 3 3 400106335 San Luis Obispo City Reservoir Number 1 Pipeline Project Historical NPDNONMUNIPRCS R3-2011-0223 12/01/2006 06/01/2007 Discharger 01/19/2006 null 299937 Enrollee 3 3SSO10320 Enrollee of SB SSO WDR for San Luis Obispo, City Of Active SSOMUNILRG 2022-0103-DWQ 07/27/2006 null Discharger 04/10/2006 null 174951 Enrollee 3 3 40MS03009 MS4 Phase 2 enrollment for San Luis Obispo City Historical MNSTW2 2003-0005-DWQ 06/30/2009 06/30/2013 Discharger 06/17/2005 null 306620 Enrollee 3 3 400706389 Enrollee under NPDES Low Threat for San Luis Obispo City Water Distribution System Historical NPDNONMUNIPRCS R3-2011-0223 12/01/2006 07/26/2016 Discharger 07/20/2006 null 185357 Enrollee 3 3 400212016 IRRIGATION WELLS Historical NPDNONMUNIPRCS 01-119 01/14/2003 11/19/2003 Discharger 09/01/2005 null 185354 Enrollee 3 3 400206023 SLO City Aquatic Pesticides Historical NPDNONMUNIPRCS 2001-0012-DWQ 06/25/2004 null Discharger 09/01/2005 null 302444 Enrollee 3 3 400406378 Recycled Water Flushing Historical NPDNONMUNIPRCS 01-119 04/11/2006 06/27/2006 Discharger 05/09/2006 null 440267 Co-Permitee SB 3 400107001 13627 Order Co-Permitee under 2020-0015-DWQ for San Luis Obispo City Active SLIC 2020-0015-DWQ 07/09/2020 null Discharger 09/18/2020 null 397914 401 Certification 3 null 401 Cert for 34014WQ16 Broad Street Bank Stabilization Historical CERFILLEXC null 12/11/2014 12/11/2021 Discharger 09/03/2014 null 386236 401 Certification 3 null WQC 34010wq07 for San Luis Obispo City Historical CERFILLEXC 34010wq07 08/27/2010 08/27/2015 Discharger 07/16/2012 null 391007 401 Certification 3 null WQC 05/16/2011 for San Luis Obispo City Historical CERFILLEXC null 05/16/2011 05/14/2016 Discharger 06/11/2013 null 379820 401 Certification 3 null 06/20/2011 for San Luis Obispo City Historical CERDREDGE null 08/16/2011 08/16/2016 Discharger 06/20/2011 null 404622 401 Certification 3 34016WQ06 401 Cert for San Luis Obispo City Historical CERFILLEXC null 11/19/2020 09/01/2021 Discharger 02/10/2016 null 398906 401 Certification 3 34014WQ21 401 Cert for San Luis Obispo City Historical CERFILLEXC null 01/15/2015 07/30/2018 Discharger 11/20/2014 null 386272 401 Certification 3 null WQC 12/6/2010 for San Luis Obispo City Historical CERFILLEXC null 12/06/2010 12/06/2015 Discharger 07/17/2012 null 379824 401 Certification 3 null 03/23/2011 for San Luis Obispo City Historical CERDREDGE null 08/16/2011 08/06/2016 Discharger 03/23/2011 null 398905 401 Certification 3 34014WQ22 401 Cert 34014WQ22 for SLO City San Luis Obispo Creek Sediment Removal Historical CERFILLEXC null 01/22/2015 08/08/2018 Discharger 11/20/2014 null 383755 401 Certification 3 null 401 Cert 04/09/2012 for San Luis Obispo City Historical CERFILLEXC null 04/09/2012 04/08/2017 Discharger 03/14/2012 null 382065 401 Certification 3 null 401 Cert 34011WQ18 for SLO City, Sed Removal SLO & Prefumo Crk Bypass Chnls Historical CERFILLEXC null 01/06/2012 01/06/2017 Discharger 11/08/2011 null 425282 401 Certification 3 34018WQ31 WQC for San Luis Obispo City Historical CERDREDGE null 09/11/2019 09/11/2024 Discharger 09/18/2018 null 385568 401 Certification 3 null 34012WQ17 401 Certification Storm Drain Repairs at Various Locations Historical CERFILLEXC null 07/30/2012 07/29/2017 Discharger 06/18/2012 null Violations within the past five calendar years Violation ID Occurrence Date Violation Type Violation Description Violation Status Priority Source Facility Name Violated Reg. Meas. ID Violated Reg. Meas. Order No. Linked To Enf. 1152141 01/31/2026 CAT1 Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 12 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1104606 04/30/2022 CAT1 Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 45.9 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1155525 04/30/2026 CAT1 Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 12.9 mg/L at EFF-001. Violation N Report San Luis Obispo WWTP 456704 R3-2024-0001 N 1125298 02/29/2024 CAT1 Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 16.5 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1144364 05/31/2025 CAT1 Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 12 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1124506 01/31/2024 CAT1 Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 15.0 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1111364 11/30/2022 CAT1 Nitrate, Total (as N) Monthly Average (Mean) limit is 42.6 mg/L and reported value was 43.2 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1131328 07/31/2024 CAT1 Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 15.0 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1140647 01/31/2025 CAT1 Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 17.0 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 Y 1130040 06/30/2024 CAT1 Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 14.0 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1126355 03/31/2024 CAT1 Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 11 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1105844 05/31/2022 CAT1 Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 47.1 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1128946 05/31/2024 CAT1 Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 14.0 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1097917 11/30/2021 CAT1 Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 43.5 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1103059 03/31/2022 CAT1 Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 46.0 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1102546 02/28/2022 CAT1 Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 46.1 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1128176 04/30/2024 CAT1 Nitrate, Total (as N) Monthly Average limit is 10.0 mg/L and reported value was 15.0 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1123548 12/31/2023 CAT1 Nitrate, Total (as NO3) Monthly Average limit is 10.0 mg/L and reported value was 12.0 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1099146 10/05/2021 CAT2 Dibromochloromethane Daily Maximum limit is 1.0 ug/L and reported value was 1.2 ug/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1099144 10/05/2021 CAT2 Dichlorobromomethane Daily Maximum limit is 1.0 ug/L and reported value was 10.8 ug/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1112441 12/03/2022 CAT2 Chlorine, Total Residual Daily Maximum limit is 0.1 mg/L and reported value was 0.76 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1099147 10/31/2021 CAT2 Dichlorobromomethane Monthly Average limit is 0.56 ug/L and reported value was 10.8 ug/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1099145 10/31/2021 CAT2 Dibromochloromethane Monthly Average limit is 0.4 ug/L and reported value was 1.2 ug/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1139140 12/31/2024 CAT2 Molybdenum, Total Monthly Average limit is 0.01 mg/L and reported value was 0.03 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 Y 1112904 10/04/2022 CAT2 Dichlorobromomethane Daily Maximum limit is 1.0 ug/L and reported value was 17.8 ug/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1112903 10/04/2022 CAT2 Dibromochloromethane Daily Maximum limit is 1.0 ug/L and reported value was 2.1 ug/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1112901 10/31/2022 CAT2 Dibromochloromethane Monthly Average limit is 0.40 ug/L and reported value was 2.1 ug/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1136645 10/31/2024 CAT2 Molybdenum, Total Monthly Average limit is 0.01 mg/L and reported value was 0.031 mg/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 Y 1112902 10/31/2022 CAT2 Dichlorobromomethane Monthly Average (Mean) limit is 0.56 ug/L and reported value was 17.8 ug/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 Y 1137872 11/05/2024 CAT2 Dibromochloromethane Maximum Daily (MDEL) limit is 0.81 ug/L and reported value was 0.9 ug/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 Y 1142750 03/31/2025 CAT2 Dichlorobromomethane Monthly Average limit is .56 ug/L and reported value was .9 ug/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 Y 1137873 11/30/2024 CAT2 Dibromochloromethane Monthly Average (Mean) limit is 0.4 ug/L and reported value was 0.9 ug/L at EFF-001. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 Y 1142754 01/28/2025 CTOX Chronic Toxicity-Green Alga-Growth Monthly Median limit is 0 % effect and reported value was 88 % effect at EFF-001. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1142753 01/13/2025 CTOX Chronic Toxicity-Green Alga-Growth Maximum Daily (MDEL) and reported value was 63 % effect at EFF-001. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1135195 09/05/2024 Deficient Monitoring The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1135196 09/06/2024 Deficient Monitoring The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1135197 09/09/2024 Deficient Monitoring The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1150453 11/04/2025 Deficient Monitoring The pH probe is typically calibrated at a frequency of approximately every 8 weeks, as recommended by the vendor for an effluent matrix. The previous calibration was on 09/09/25. Drift was observed at the 8 week interval. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123551 12/13/2023 Deficient Monitoring Color The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. 12/13/23 RSW-005 39 color units, 31 color units greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1109378 09/19/2022 Deficient Monitoring Ammonia as N has a minimum sampling frequency of once per week. Three samples were taken for the month of September, no sample was taken the week of 9/19/22. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1135089 09/02/2024 Deficient Monitoring The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1135194 09/10/2024 Deficient Monitoring The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1135198 09/12/2024 Deficient Monitoring The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1135201 09/11/2024 Deficient Monitoring The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1136644 10/23/2024 Deficient Monitoring Sodium hypochlorite was used to disinfect and clean a UV vessel on 10/23/24. The total estimated volume of sodium hypochlorite used was 5 gallons. Only one EFF-001 total chlorine residual sample was taken. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1135200 09/04/2024 Deficient Monitoring The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1135199 09/03/2024 Deficient Monitoring The Water Quality Laboratory used method Standard Methods 9223 for Total Coliform Monitoring through 9/12/24. Standard Methods 9223 is not approved to measure Total Coliforms in wastewater but is approved to measure coliforms in Title 22 Recycled water. All analyses conducted through 9/12/24 are reported at the monitoring location EFF-002. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1102545 02/28/2022 Deficient Monitoring Eff-001 was not sampled for Oil and Grease in February 2022. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1116495 05/01/2023 Deficient Reporting Q1 Pretreatment Report was not submitted by the 5/1/2023 deadline. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1109883 10/05/2021 Enforcement Action [4 Violations noted here, and any subsequent THM violations that occur during the effect of the TSO] Failed to achieve compliance with permit final effluent limit for dichlorobromomethane by 3/31/2020 in violation of TSO Requirements No. 2 and No. 3. Subjects discharger to mmps based on permit final effluent limits. See Violations 1099144, 1099145, 1099146, and 1099147. Violation N Report San Luis Obispo WWTP 435710 R3-2019-0124 N 1100636 02/02/2022 Late Report Annual SMR ( SLUDGE ) (Biosolids (Sludge) Tech Rpt) report for 2021 (2416393) was due on 01-FEB-22 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1119230 08/02/2023 Late Report Monthly SMR ( MONNPDES ) (NPDES Mon Rpt Monthly) report for June 2023 (2705561) was due on 01-AUG-23 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1140080 02/04/2025 Late Report Annual SMR ( PRETRPT ) (Pretreatment Annual) report for 2024 (2788362) was due on 03-FEB-25 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1153941 02/04/2025 Late Report Annual SMR ( SLUDGE ) (Biosolids (Sludge) Tech Rpt) report for 2024 (3118015) was due on 03-FEB-25 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1151299 02/03/2026 Late Report Annual SMR ( SLUDGE ) (Biosolids (Sludge) Tech Rpt) report for 2025 (2910149) was due on 02-FEB-26 Violation null Report San Luis Obispo WWTP 456704 R3-2024-0001 N 1150441 01/02/2026 Late Report Monthly SMR ( MONNPDES ) (NPDES Mon Rpt Monthly) report for November 2025 (2910136) was due on 01-JAN-26 Violation null Report San Luis Obispo WWTP 456704 R3-2024-0001 N 1153939 02/02/2025 Late Report Annual SMR ( MONNPDES ) (NPDES Mon Rpt Annual) report for 2024 (3118016) was due on 01-FEB-25 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1136008 11/02/2024 Late Report Quarterly SMR ( PRETRPT ) (Pretreatment Mon Rpt Quarterly) report for Q3 2024 (2910117) was due on 01-NOV-24 Violation null Report San Luis Obispo WWTP 456704 R3-2024-0001 N 1136023 11/02/2024 Late Report Quarterly SMR ( PRETRPT ) (Pretreatment Mon Rpt Quarterly) report for Q3 2024 (2829692) was due on 01-NOV-24 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1140077 02/04/2025 Late Report Annual SMR ( SLUDGE ) (Biosolids (Sludge) Tech Rpt) report for 2024 (2910122) was due on 03-FEB-25 Violation null Report San Luis Obispo WWTP 456704 R3-2024-0001 N 1140079 02/04/2025 Late Report Annual SMR ( SLUDGE ) (Biosolids (Sludge) Tech Rpt) report for 2024 (2788364) was due on 03-FEB-25 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1136007 11/02/2024 Late Report Quarterly SMR ( MONNPDES ) (NPDES Mon Rpt Quarterly) report for Q3 2024 (2910119) was due on 01-NOV-24 Violation null Report San Luis Obispo WWTP 456704 R3-2024-0001 N 1140054 02/02/2025 Late Report Annual SMR ( MONNPDES ) (NPDES Mon Rpt Annual) report for 2024 (2788365) was due on 01-FEB-25 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1153942 02/16/2025 Late Report Annual SMR ( SUMRPT ) (Summary Report) report for 2024 (3118014) was due on 15-FEB-25 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1124274 02/02/2024 Late Report Annual SMR ( SLUDGE ) (Biosolids (Sludge) Tech Rpt) report for 2023 (2673352) was due on 01-FEB-24 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1153940 02/04/2025 Late Report Annual SMR ( PRETRPT ) (Pretreatment Annual) report for 2024 (3118013) was due on 03-FEB-25 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1140755 02/16/2025 Late Report Annual SMR ( SUMRPT ) (Summary Report) report for 2024 (2788363) was due on 15-FEB-25 Violation null Report San Luis Obispo WWTP 399576 R3-2014-0033 N 1122311 10/29/2023 OEV pH Instantaneous Maximum limit is 8.3 SU and reported value was 8.4 SU at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1120440 08/04/2023 OEV pH Instantaneous Maximum limit is 8.3 SU and reported value was 8.40 SU at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1155530 10/05/2025 OEV pH Instantaneous Maximum limit is 8.3 SU and reported value was 8.4 SU at EFF-001. Violation null Report San Luis Obispo WWTP 456704 R3-2024-0001 N 1155528 09/07/2025 OEV pH Instantaneous Maximum limit is 8.3 SU and reported value was 8.4 SU at EFF-001. Violation null Report San Luis Obispo WWTP 456704 R3-2024-0001 N 1155529 09/09/2025 OEV pH Instantaneous Maximum limit is 8.3 SU and reported value was 8.4 SU at EFF-001. Violation null Report San Luis Obispo WWTP 456704 R3-2024-0001 N 1155534 10/22/2025 OEV pH Instantaneous Maximum limit is 8.3 SU and reported value was 8.4 SU at EFF-001. Violation null Report San Luis Obispo WWTP 456704 R3-2024-0001 N 1155535 10/23/2025 OEV pH Instantaneous Maximum limit is 8.3 SU and reported value was 8.4 SU at EFF-001. Violation null Report San Luis Obispo WWTP 456704 R3-2024-0001 N 1120441 08/17/2023 OEV pH Instantaneous Maximum limit is 8.3 SU and reported value was 8.31 SU at EFF-001. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1135091 09/19/2024 Order Conditions Effluent-002 7 Sample Median 3.1 MPN/100 mL on 9/19/24. The elevated results were all analyzed using Standard Methods 9223. Standard Methods 9223 is prone to a positive test interference from non-coliform heterotrophic background bacteria. All results have been <1.8 MPN/ 100mL since switching to the analytical method SM 9221 (Multiple Tube Fermentation). Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1135093 09/12/2024 Order Conditions Effluent-002 Total Coliform Daily Max 25.6 MPN/100 mL on 9/12/24. The elevated results were all analyzed using Standard Methods 9223. Standard Methods 9223 is prone to a positive test interference from non-coliform heterotrophic background bacteria. All results have been <1.8 MPN/ 100mL since switching to the analytical method SM 9221 (Multiple Tube Fermentation). Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123371 10/12/2023 Order Conditions Discharge of effluent that altered the quality of its waters to a degree that unreasonably affected warm and cold fresh water habitats, migration, and spawning, reproduction, and development in violation of permit's Standard Provision II.B.1. Violation N Report San Luis Obispo WWTP 399576 R3-2014-0033 Y 1123374 10/12/2023 Order Conditions Discharge of treated wastewater at an unapproved location in violation of permit's Discharge Prohibition III.A. Violation N Report San Luis Obispo WWTP 399576 R3-2014-0033 Y 1135090 09/13/2024 Order Conditions Effluent-002 Total Coliform Daily Max 65.0 MPN/100 mL on 9/13/24. The elevated results were all analyzed using Standard Methods 9223. Standard Methods 9223 is prone to a positive test interference from non-coliform heterotrophic background bacteria. All results have been <1.8 MPN/ 100mL since switching to the analytical method SM 9221 (Multiple Tube Fermentation). Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1095480 10/19/2021 Sanitary Sewer Overflow/Spill/ Type: Category 1. Pipe Structural Problem/Failure;NA caused 175.0 gallons of sewage to spill from Gravity Mainline;NA at 1023 Chorro to Beach;Surface Water;NA. Surface water body affected (San Luis Obispo creek). Violation N SSO San Luis Obispo CS 299937 2022-0103-DWQ N 1152740 02/24/2026 Sanitary Sewer Overflow/Spill/ Type: Category 1 Spill; Root Intrusion caused 413 gallons of sewage to spill from Manhole at 3225 Flora to Paved Surface,Drainage Conveyance System that discharges to surface water,Street/Curb and Gutter (2 3) Violation null SSO San Luis Obispo CS 299937 2022-0103-DWQ N 1149627 11/17/2025 Sanitary Sewer Overflow/Spill/ Type: Category 1 Spill; Debris-General caused 1740 gallons of sewage to spill from Manhole at 2260 Santa Ynez to Street/Curb and Gutter (2 3),Drainage Conveyance System that discharges to surface water,Surface Water Violation null SSO San Luis Obispo CS 299937 2022-0103-DWQ N 1115625 04/19/2023 Sanitary Sewer Overflow/Spill/ Type: Category 3. Grease Deposition (FOG);The mainline blocked of with grease. caused 3.0 gallons of sewage to spill from Manhole;The spill appeared out of the manhole K09-22. at 1312 Johnson to Separate Storm Drain;A small amount of the spill reached San Luis Creek.. No surface water body affected. Violation N SSO San Luis Obispo CS 299937 2022-0103-DWQ N 1111500 12/26/2022 Sanitary Sewer Overflow/Spill/ Type: Category 1. Root Intrusion;The spill was caused by root intrusion into the city sewer main. caused 5.0 gallons of sewage to spill from Manhole;The Spill appeared out of manhole M07-1 in front of 2243 Santa Ynez. at 2243 Santa Ynez to Separate Storm Drain;The spill entered a separate storm drain.. Surface water body affected (San Luis Creek). Violation N SSO San Luis Obispo CS 299937 2022-0103-DWQ N 1111653 12/31/2022 Sanitary Sewer Overflow/Spill/ Type: Category 1. Grease Deposition (FOG);We believe the spill was caused by grease (FOG) and cleaning wipes. caused 4250.0 gallons of sewage to spill from Manhole;The spill came out of Manhole ID K09-20. at 1043 Higuera St. to Separate Storm Drain;The spill entered San Luis Creek.. Surface water body affected (San Luis Creek). Violation N SSO San Luis Obispo CS 299937 2022-0103-DWQ Y 1139349 01/24/2025 Sanitary Sewer Overflow/Spill/ Type: Category 1 Spill; Collection System Maintenance Failure (specify below) caused 35 gallons of sewage to spill from Gravity Mainline at 1023 Chorro to Surface Water Violation null SSO San Luis Obispo CS 299937 2022-0103-DWQ N 1103329 04/24/2022 Sanitary Sewer Overflow/Spill/ Type: Category 1. Debris-General;The spill was caused by grit in the City main. caused 46.0 gallons of sewage to spill from Manhole;Spill came out of manhole k11-59 at 2160 Santa Barbra St. to Drainage Channel. Surface water body affected (San Luis Creek). Violation N SSO San Luis Obispo CS 299937 2022-0103-DWQ N 1133723 07/23/2024 Sanitary Sewer Overflow/Spill/ Type: Category 1 Spill; Debris from Lateral, Root Intrusion caused 911 gallons of sewage to spill from Lateral Clean Out (Private) at 2015 Monterey St to Paved Surface, Surface Water, Unpaved Surface Violation null SSO San Luis Obispo CS 299937 2022-0103-DWQ N 1107172 08/15/2022 Sanitary Sewer Overflow/Spill/ Type: Category 1. Operator Error;Souza construction was working on Broad x Ramona and hit a 10" water main. The discharge from the water main break entered the sewer system and caused our system to back up. caused 103250.0 gallons of sewage to spill from Manhole;The spill appeared at manholes J07-1, J07-18, I06-50, and JO7-23. A map of the manhole/spill locations is attached to the report. at 64 Broad St. to Surface Water;The spill entered Old Garden Creek which flows to Avila Beach.. Surface water body affected (Old Garden Creek has been impacted by the spill.). Violation N SSO San Luis Obispo CS 299937 2022-0103-DWQ Y 1123544 12/10/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/10/23 RSW-005 22.6 °C, 14°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123552 12/15/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/15/23 RSW-005 21.7 °C, 13°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1121454 09/20/2023 Surface Water RSW-005, exceeded 22.5 Deg C, sample taken at 0948 9/20/23 had a recorded temperature fo 23.7 Deg C. Effluent temperature sampled at 1003 9/20/23 had a temperature of 25.4 Deg C. Operations staff is currently working through programming of the new facility and trying to balance effluent pH compliance with receiving water temperature limits. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1130041 06/19/2024 Surface Water RSW-005 was 16 true color units greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123561 12/01/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/1/23 RSW-005 22.1 °C, 12°F greater than RSW-004. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1122850 11/01/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.9 °C, 13°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123085 11/05/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 23.4 °C, 10°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1154848 04/07/2026 Surface Water RSW-005 was 20 true color units greater than RSW-004. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1132901 08/22/2024 Surface Water Increase of 24color units from RSW-004 and RSW-005. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1139139 12/11/2024 Surface Water Receiving Water RSW-005 Color - RSW-005 was 30 true color units greater than RSW-004. The SLO WRRF upgrade, known as SLO Water+, is nearing completion; however, the facility can only operate on its full biological treatment process until the completion of the Liquids Phase Two. With two of four bioreactors online, hydraulic retention time is limited. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123082 11/06/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 23.9 °C, 11°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1150451 11/04/2025 Surface Water RSW-004 had a true color value of 6 and RSW-005 had a true color value of 42. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1132902 08/29/2024 Surface Water Increase of 29 color units from RSW-004 and RSW-005. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1121453 09/27/2023 Surface Water Unionized ammonia at RSW-005 was 0.0500 mg/L as N on 9/27/23 14:16. All aeration blowers were in use and unable to sustain an elevated dissolved oxygen level in the bioreactor's aeration zone. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1131327 07/31/2024 Surface Water Increase of 19 color units from RSW-004 and RSW-005. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123556 12/09/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/9/23 RSW-005 20.8 °C, 12°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123083 11/08/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.8 °C, 7°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123098 11/23/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 21.7 °C, 10°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1149683 10/07/2025 Surface Water RSW-004 had a true color value of 6 and RSW-005 had a true color value of 48 on 10/7/25. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1140646 01/07/2025 Surface Water The diffference in true color units between RSW-005 and RSW-004 was 28. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1139138 07/02/2024 Surface Water The annual running mean for RSW-005 sodium was 70 mg/L. THIS VIOLATION HAS BEEN REPORTED UNDER THE PREVIOUS NPDES PERMIT FOR QUARTER 3 2024. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123099 11/11/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 19.3. °C, 10°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123562 12/06/2023 Surface Water Color The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. 12/6/23 RSW-005 37 color units, 29 color units greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1122310 10/25/2023 Surface Water Receiving surface water temperature exceeded 22.5 degrees C at 13:41 on 10/16/23, with a recorded temperature of 23.3 degrees C. EFF-001 temperature was 24.5 degrees C at 13:53. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123093 11/30/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.1 °C, 10°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1130042 04/02/2024 Surface Water Annual running mean 72mg/L Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1124505 01/10/2024 Surface Water RSW-004 Temp 12.8 Deg C, RSW-005 17.6 Deg C, 9 deg F difference Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1150784 12/01/2025 Surface Water The annual running mean for sulfate at RSW-005 was 105 mg/L, the surface water quality objective is 100 mg/L. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123542 12/28/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/28/23 RSW-005 19.4 °C, 8°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123104 11/22/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.0 °C, 10°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123087 11/15/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.7 °C, 14°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1122314 10/12/2023 Surface Water RSW-005 unionized ammonia as N was 1.42 mg/L on 10/12/23 at 10:00. Effluent - 001 ammonia as N had a reported value of 35 mg/L on 10/12/23 at 10:13. On 10/14/23, RSW-005 unionized ammonia as N was .304 mg/L at 09:25. On 10/15/23, RSW-005 unionized ammonia as N was 0.0124 mg/L at 09:21. Elevated receiving water unionized ammonia levels were due to high effluent ammonia being discharged. High-effluent ammonia was traced back to high solids loading and oxygen demand on the bioreactor. Solids loading was due to construction sequencing, loss of the dissolved air flotation thickener, and solids being unable to be removed from the system. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123086 11/14/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.8. °C, 7°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1126356 01/02/2024 Surface Water RSW-005 annual running mean for sodium was 79 mg/L. WRRF Influent sodium was 110 mg/L and EFF-001 was 101 mg/L on 1/2/2024. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123543 12/04/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/4/23 RSW-005 22.1 °C, 12°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123096 11/12/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.7 °C, 10°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1141746 02/04/2025 Surface Water The difference in true color units between RSW-004 and RSW-005 was 37 on 2/4/25 Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123554 12/08/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/8/23 RSW-005 21.6 °C, 11°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1147955 08/12/2025 Surface Water RSW-004 and RSW-005 had a temperature difference of 7.9 degrees Fahrenheit.RSW-004 had a temperature of 66.2 degrees Fahrenheit on 8/12/25, and RSW-005 had a temperature of 74.1 degrees Fahrenheit on 8/12/25. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123541 12/20/2023 Surface Water Color The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. 12/20/23 RSW-005 35 color units, 25 color units greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123100 11/20/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.6 °C, 9°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123095 11/07/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 23. °C, 11°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123097 11/19/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.6 °C, 8°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123089 11/17/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 24.0 °C, 14°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123369 10/12/2023 Surface Water Discharge of effluent containing toxic substances in concentrations toxic to aquatic life that produced detrimental physiological responses in steelhead trout in violation of permit's Receiving Water Limitation V.A.14. Violation N Report San Luis Obispo WWTP 399576 R3-2014-0033 Y 1123373 10/12/2023 Surface Water Discharge that increased the concentration of ammonia, an inorganic chemical, and adversely affected warm and cold fresh water habitats, migration, and spawning, reproduction, and development in violation of permit's Receiving Water Limitation V.A.9. Violation N Report San Luis Obispo WWTP 399576 R3-2014-0033 Y 1123370 10/12/2023 Surface Water Discharge of waste that caused concentrations of un-ionized ammonia to exceed 0.025 mg/L (as nitrogen) in San Luis Obispo Creek in violation of permit's Receiving Water Limitation V.A.15. Violation N Report San Luis Obispo WWTP 399576 R3-2014-0033 Y 1123092 11/28/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 21.8 °C, 14°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123106 11/25/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.0 °C, 11°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123559 12/07/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/7/23 RSW-005 22.1 °C, 12°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123102 11/29/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 20.2 °C, 12°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123558 12/06/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/6/23 RSW-005 22.1 °C, 12°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123090 11/09/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 22.4 °C, 12°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1146676 07/01/2025 Surface Water Color at RSW-004 was 7 true color units on 7/1/2025. Color at RSW-005 was 38 true color units on 7/1/2025 for a difference of 31 true color units. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1145027 06/03/2025 Surface Water RSW-005 True Color Units had a reported value of 32 on 6/3/25, and RSW-004 True Color Units had a reported value of 8. The difference between RSW-004 and RSW-005 was 24 True Color Units. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123550 12/17/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/17/23 RSW-005 21.1 °C, 12°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123088 11/16/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 24.1 °C, 13°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1122851 11/01/2023 Surface Water The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. Result for color analysis: 37 color units, 29 color units greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123091 11/27/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 21.5 °C, 14°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1136646 10/15/2024 Surface Water Receiving Water RSW-005 Color - RSW-005 was 33 true color units greater than RSW-004. The SLO WRRF upgrade, known as SLO Water+, is nearing completion; however, the facility can only operate on its full its biological treatment process until the completion of the Liquids Phase Two. With two of four bioreactors online, hydraulic retention time is limited. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123547 12/12/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/12/23 RSW-005 21.6 °C, 12°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123560 12/14/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/14/23 RSW-005 21.7 °C, 13°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123557 12/02/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/2/23 RSW-005 22.3 °C, 13°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123107 11/07/2023 Surface Water Water The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. Result for color analysis: 36 color units, 28 color units greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1144365 05/06/2025 Surface Water RSW-004 True Color was 8 true color units on 5/6/25, and RSW-005 True Color was 29 true color units, resulting in a difference of 21 true color units. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1150783 12/01/2025 Surface Water Annual running mean for sodium was 96 mg/L, the receiving water quality objective is 50 mg/L. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123101 11/26/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 21.2 °C, 11°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1141745 02/04/2025 Surface Water Receiving water temperature between RSW-004 and RSW-005 differed by 9.5 degrees Fahrenheit on 2/4/25. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123094 11/15/2023 Surface Water Water The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. Result for color analysis: 41 color units, 33 color units greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123545 12/05/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/5/23 RSW-005 22.9 °C, 12°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123103 11/13/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 23.0 °C, 15°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1148815 09/02/2025 Surface Water RSW-004 Temperatre was 67 Deg F and RSW-005 was 76 Deg F, a difference in 9 Deg F. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1124513 01/10/2024 Surface Water RSW-004 11 Color Units, RSW-005 27 Color units. The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123084 11/04/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 18.2 °C, 6°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1124512 01/30/2024 Surface Water RSW-004 13 Color Units, RSW-005 29 Color units. The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1146675 07/01/2025 Surface Water The temperature at RSW-004 was 17.1 degrees C (63 F) on 7/1/2025. The temperature at RSW-005 was 22.5 degrees C (72 F) on 7/1/2025 for a difference of 9 degrees F. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1124503 01/30/2024 Surface Water RSW-004 Temp 13.7 Deg C, RSW-005 17.4 Deg C, 7 deg F difference Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123105 11/24/2023 Surface Water Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. RSW-005 temp: 21.5 °C, 10°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1131325 07/02/2024 Surface Water Increase of 19 color units from RSW-004 and RSW-005. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123549 12/13/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/13/23 RSW-005 21.9 °C, 14°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1124508 01/18/2024 Surface Water RSW-004 Temp 13.3 Deg C, RSW-005 18.5 Deg C, 10 deg F difference not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1137870 11/05/2024 Surface Water color Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1132900 08/06/2024 Surface Water Increase of 16 color units from RSW-004 and RSW-005. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1137871 11/05/2024 Surface Water temperature Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123546 12/11/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/11/23 RSW-005 22.0. °C, 13°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1134600 07/02/2024 Surface Water The annual running mean for RSW-005 sodium was 70 mg/L Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1150452 11/04/2025 Surface Water RSW-004 Temperature was 61 Deg F and RSW-005 was 76 Deg F, a difference in 15 Deg F. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1148814 09/02/2025 Surface Water RSW-004 had a true color value of 8 and RSW-005 had a true color value of 38. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1150481 12/02/2025 Surface Water RSW-005 was 12 degrees F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1149682 10/07/2025 Surface Water RSW-004 Temperatre was 64 Deg F and RSW-005 was 78 Deg F, a difference in 14 Deg F on 10/7/25. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1147956 08/12/2025 Surface Water The difference in True Color Units between RSW-004 and RSW-005 was 33. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1122312 10/16/2023 Surface Water Receiving surface water temperature exceeded 22.5 degrees C at 14:40 on 10/16/23. EFF-001 temperature was 22.5 degress C at 10:53. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1124504 01/02/2024 Surface Water RSW-004 Temp 13.7 Deg C, RSW-005 17.8 Deg C, 7 deg F difference Not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1150480 12/02/2025 Surface Water RSW-005 was 22 true color units greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1140038 12/03/2024 Surface Water Sodium Annual Mean was 76 mg/L at RSW-005 Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1124510 01/18/2024 Surface Water RSW-004 8 Color Units, RSW-005 30 Color units. The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1122313 10/04/2023 Surface Water RSW-005 exceeded RSW-004 true color units on 10/4/23 (19 units), 10/12/23 (28 color units), 10/18/23 (21 color units), and 10/25/23 (27 color units). Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1135092 09/03/2024 Surface Water RSW-005 was 26 true color units greater than RSW-004. The SLO WRRF upgrade, known as SLO Water+, is nearing completion; however, the facility can only operate on its full its biological treatment process until the completion of the Liquids Phase Two. With two of four bioreactors online, hydraulic retention time is limited. Violation N eSMR San Luis Obispo WWTP 456704 R3-2024-0001 N 1123553 12/16/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/16/23 RSW-005 21.2 °C, 14°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1131326 07/17/2024 Surface Water Increase of 19 color units from RSW-004 and RSW-005. Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1121452 09/06/2023 Surface Water The upgraded liquids treatment process does not use sodium hypochlorite for disinfection. True color-causing substances, like humic acids, are not removed by the membrane filtration unit. Elevated EFF-001 color impacted receiving water color quality at RSW-005 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N 1123555 12/03/2023 Surface Water Temperature not enough cooling towers were in service. The operations team has been balancing elevated effluent pH (see past EFF-001 exceedances on 8/4/23 and 8/17/23) with receiving water temperatures. 12/3/23 RSW-005 21.9 °C, 12°F greater than RSW-004 Violation N eSMR San Luis Obispo WWTP 399576 R3-2014-0033 N Enforcement Actions Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status 248028 Notice of Violation UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 08/15/2002 Historical 455271 Admin Civil Liability R3-2024-0004 ACL R3-2024-0004 for San Luis Obispo City NPDMUNILRG 02/14/2024 Historical 222293 Admin Civil Liability 86-179 Enforcement - 3 400107001 NPDMUNILRG 05/02/1986 Historical 222588 Cease and Desist Order 90-014 Enforcement - 3 400107001 NPDMUNILRG 04/13/1990 Historical 239617 Notice of Violation UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 03/18/2002 Historical 248205 Notice of Violation 88-09901 Enforcement - 3 400107001 NPDMUNILRG 07/26/2002 Historical 248206 Notice of Violation UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 07/26/2002 Historical 261513 Admin Civil Liability R3-2005-0130 ACL R3-2005-0130 for San Luis Obispo City NPDMUNILRG 12/02/2005 Historical 299762 Oral Communication null Verbal Enforcement Action for City of San Luis Obispo WWTP NPDMUNILRG 08/19/2005 Historical 403228 Staff Enforcement Letter null SEL 07/29/2015 for San Luis Obispo City CERFILLEXC 07/29/2015 Historical 407200 Staff Enforcement Letter null SEL 06/28/2016 for San Luis Obispo City CERFILLEXC 06/28/2016 Historical 437392 Staff Enforcement Letter null SEL 03/26/2020 for San Luis Obispo City CS Late Report Certfication for 3/8/20 25K SSO SSOMUNILRG 03/26/2020 Historical 435710 Time Schedule Order R3-2019-0124 TSO R3-2019-0124 for San Luis Obispo City WWTP NPDMUNILRG 12/01/2019 Historical 452410 Notice of Violation null NOV 04/17/2023 for San Luis Obispo City Sanitary Sewer System SSOMUNILRG 04/17/2023 Historical 252860 Admin Civil Liability R3-2004-0126 Enforcement - 3 400107001 NPDESWW 09/10/2004 Historical 407201 Staff Enforcement Letter null SEL 06/28/2016 for San Luis Obispo City CERFILLEXC 06/28/2016 Historical 403231 Staff Enforcement Letter null SEL 07/29/2015 for San Luis Obispo City CERFILLEXC 07/29/2015 Historical 222793 Cease and Desist Order 86-064A1 Enforcement - 3 400107001 NPDMUNILRG 06/12/1987 Historical 238054 Admin Civil Liability R3-2001-120 Enforcement - 3 400107001 NPDMUNILRG 11/06/2001 Historical 246123 Staff Enforcement Letter UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 11/26/2002 Historical 253280 Oral Communication UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 11/08/2004 Historical 222825 Admin Civil Liability 88-136 Enforcement - 3 400107001 NPDMUNILRG 07/08/1988 Historical 227303 Admin Civil Liability R3-2001-0017 Enforcement - 3 400001N01 UNREGS 02/02/2001 Historical 254088 Oral Communication UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 09/24/2004 Historical 349194 Oral Communication null VER for San Luis Obispo CS SSOMUNILRG 02/28/2008 Historical 363726 Notice of Violation null NOV for San Luis Obispo, City Of SSOMUNILRG 03/13/2009 Historical 425264 Notice of Violation null NOV 09/07/2018 for San Luis Obispo City CERFILLEXC 09/07/2018 Historical 450286 Admin Civil Liability R3-2023-0005 ACL R3-2023-0005 for San Luis Obispo City NPDMUNILRG 02/23/2023 Historical 438868 Notice of Violation null NOV 06/22/2020 for San Luis Obispo City CS 25K SSO SSOMUNILRG 06/22/2020 Historical 252525 Staff Enforcement Letter UNKNOWN Enforcement - 3 400206023 NPDNONMUNIPRCS 04/09/2004 Historical 253279 Oral Communication UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 10/01/2004 Historical 461617 Admin Civil Liability R3-2025-0052 ACL R3-2025-0052 for San Luis Obispo City NPDMUNILRG 09/05/2025 Historical 222724 Clean-up and Abatement Order 88-099 Enforcement - 3 400107001 NPDMUNILRG 05/06/1988 Historical 222946 Cease and Desist Order 86-064 Enforcement - 3 400107001 NPDMUNILRG 04/11/1986 Historical 227949 Notice of Violation UNKNOWN Enforcement - 3 400001N01 UNREGS 07/26/2000 Historical 251891 Staff Enforcement Letter UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 05/04/2004 Historical 253378 Oral Communication UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 08/30/2004 Historical 254084 Oral Communication UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 10/19/2004 Historical 300370 Oral Communication null Verbal Enforcement Action for San Luis Obispo WWTP NPDMUNILRG 01/11/2006 Historical 308186 Notice of Violation null NOV for SAN LUIS OBISPO, CITY OF NPDNONMUNIPRCS 08/22/2006 Historical 381390 Admin Civil Liability R3-2011-0212 ACL R3-2011-0212 for San Luis Obispo City CS SSOMUNILRG 10/07/2011 Historical 395894 Notice of Violation null NOV & 13267 Order 4/25/14 for SLO City Ca Blvd Potable Water Spill to SLO Crk DISCHSW 04/25/2014 Historical 399710 Time Schedule Order R3-2014-0036 TSO R3-2014-0036 for San Luis Obispo City WWTP NPDMUNILRG 12/01/2014 Historical 402901 Notice of Violation null NOV 09/02/15 for 34014WQ16 Broad Street Bank Stabilization CERFILLEXC 09/02/2015 Historical 455677 Notice of Violation null NOV 01/24/2024 for San Luis Obispo City WWTP NPDMUNILRG 01/24/2024 Historical 450300 Notice of Violation null NOV 11/21/2022 for San Luis Obispo City CS SSOMUNILRG 11/21/2022 Historical 228061 Notice to Comply UNKNOWN Enforcement - 3 400001N01 UNREGS 08/23/2000 Historical 249873 Staff Enforcement Letter UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 12/01/2003 Historical 251581 Notice of Violation UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 04/26/2004 Historical 299187 Notice of Violation null NOV for City of San Luis Obispo WWTP NPDMUNILRG 01/24/2006 Historical 403216 Staff Enforcement Letter null SEL 07/30/2015 for SLO City 34014WQ22 San Luis Obispo Creek Sediment Removal CERFILLEXC 07/30/2015 Historical 444062 Admin Civil Liability R3-2021-0061 ACL R3-2021-0061 for San Luis Obispo City NPDMUNILRG 03/23/2022 Historical 249714 Staff Enforcement Letter UNKNOWN Enforcement - 3 400401159 NPDNONMUNIPRCS 03/23/2005 Historical 249874 Staff Enforcement Letter UNKNOWN Enforcement - 3 400107001 NPDMUNILRG 12/01/2003 Historical 299764 Oral Communication null Verbal Enforcement Action for City of San Luis Obispo WWTP NPDMUNILRG 10/18/2005 Historical 353205 Admin Civil Liability SWB-2008-3-0016 ACL SWB-2008-3-0016 for San Luis Obispo City NPDMUNILRG 02/19/2016 Historical 373789 Oral Communication null Oral Com 03/16/2010 for SAN LUIS OBISPO, CITY OF SSOMUNILRG 03/16/2010 Historical 374003 Time Schedule Order R3-2010-0013 TSO R3-2010-0013 for City of San Luis Obispo NPDMUNILRG 03/30/2010 Historical 406950 Notice of Violation null NOV 06/16/2016 for San Luis Obispo City CERFILLEXC 06/16/2016 Active 406051 Notice of Violation null NOV 05/05/2016 for San Luis Obispo City 1/31/16 SSO SSOMUNILRG 05/05/2016 Active 456715 Time Schedule Order R3-2024-0021 TSO R3-2024-0021 for San Luis Obispo City NPDMUNILRG 09/01/2024 Active Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status 399576 David Hix NPDES Permit NPDMUNILRG 12/01/2014 Historical 399576 David Hix NPDES Permit NPDMUNILRG 12/01/2014 Historical 407879 Donald Thomas Enrollee - NPDES NPDNONMUNIPRCS 07/01/2016 Active