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   Party At-A-Glance Report

  
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General Information
Party ID Party Name Party Classification Mailing Address Work Phone Email/Website
524918 USDI National Park Service Yosemite National Park Federal Agency Po Box 700 El Portal, CA 95318 209-372-0201 None
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
901299 Kerrick Meadow Trail Reroute and Meadow Restoration Project Tuolumne 5S Dredge/Fill Site Owner 05/20/2025 None
900900 El Capitan Bridge Emergency Repair Mariposa 5F Dredge/Fill Site Owner 04/23/2025 None
899475 Rehabilitate Tuolumne Meadows Water Distribution System Project Tuolumne 5S Dredge/Fill Site Owner 02/05/2025 None
896836 Old El Portal Debris Basin Mariposa 5F Dredge/Fill Site Owner 10/07/2024 None
895050 Rocky Point Meadow Restoration Mariposa 5F Dredge/Fill Site Owner 05/28/2024 None
894593 Yosemite Environmental Education Campus Nature Bridge Mariposa 5F Campground Owner 04/26/2024 None
894593 Yosemite Environmental Education Campus Nature Bridge Mariposa 5F Campground Land Owner 04/26/2024 None
893311 Ranger Station Meadow Trail Reroute and Meadow Restoration Project Tuolumne 5S Dredge/Fill Site Owner 02/06/2024 None
888146 Mariposa Grove Rd Repair Mariposa 5F Dredge/Fill Site Owner 05/08/2023 None
887998 Ahwahnee Bridge Riprap Removal Restoration Mariposa 5F Dredge/Fill Site Owner 04/26/2023 None
886907 Upper Pines Dump Sation Mariposa 5F Dredge/Fill Site Owner 03/06/2023 None
882855 Sugarpine Bridge Floodplain Mariposa 5F Dredge/Fill Site Owner 08/22/2022 None
882407 Sugarpine Bridge Floodplain Restoration Mariposa 5F Dredge/Fill Site Owner 07/22/2022 None
881314 Bridalveil Meadow Mariposa 5F Dredge/Fill Site Owner 05/20/2022 None
881241 West Tuolumne Meadows Pothole Dome "Thumb" Restoration Project Tuolumne 5S Dredge/Fill Site Owner 05/17/2022 None
879420 Ackerson Meadow Restoration Project Tuolumne 5S Dredge/Fill Site Owner 02/15/2022 None
877274 Rehabilitate Tuolumne Meadows Campground Tuolumne 5F Dredge/Fill Site Owner 10/29/2021 None
875594 Leidig Meadow (Yosemite National Park) Mariposa 5F Dredge/Fill Site Owner 07/30/2021 None
875044 Rehabilitation of Bridalveil Creek Campground Water Distribution System Phase I Mariposa 5F Dredge/Fill Site Owner 06/29/2021 None
874326 Stoneman Bridge Raft Put In Mariposa 5F Dredge/Fill Site Owner 05/26/2021 None
867814 Stoneman Meadow Ditch Restoration Project Mariposa 5F Dredge/Fill Site Owner 07/08/2020 None
866755 Crane Flat Campground Mariposa 5F Dredge/Fill Site Owner 05/13/2020 None
866686 Glacier Point Road Rehabilitation Mariposa 5F Dredge/Fill Site Owner 05/08/2020 None
865754 Tioga Road Rehabilitation Tuolumne 5F Dredge/Fill Site Owner 03/24/2020 None
857643 Wawona Wastewater Treatment System Rehabilitation Mariposa 5F Dredge/Fill Site Owner 04/15/2019 None
857114 Yosemite Bridges Preservation Project Mariposa 5F Dredge/Fill Site Owner 03/22/2019 None
852031 Wawona Road and Glacier Point Road Culvert Replacement Project Mariposa 5S Dredge/Fill Site Owner 10/26/2018 None
849042 Upper Pines Campground RV Dump Station Bank Stabilization Mariposa 5F Dredge/Fill Site Owner 07/13/2018 None
839374 El Capitan Meadow Ecological Restoration Mariposa 5F Dredge/Fill Site Owner 08/29/2017 None
826481 South Entrance Wastewater Facility Mariposa 5F Wastewater Treatment Facility Owner and Operator 07/20/2016 None
826082 Wawona and Mariposa Grove Road Rehabilitation Mariposa 5F Dredge/Fill Site Owner 07/07/2016 None
824551 Ahwahnee Meadow Ecological Restoration Mariposa 5F Dredge/Fill Site Owner 05/12/2016 None
824096 Rehabilitation of Yosemite Valley Loop Road Mariposa 5F Dredge/Fill Site Owner 04/26/2016 None
820907 Yosemite Village Day-Use Parking Area Mariposa 5F Dredge/Fill Site Owner 01/12/2016 None
817663 East Yosemite Valley River Restoration Mariposa 5F Dredge/Fill Site Owner 08/28/2015 None
816491 Lower Grove OWTS, Mariposa Grove of Giant Sequoias Mariposa 5F Wastewater Treatment Facility Owner and Operator 07/09/2015 None
814816 Restoration of Mariposa Grove Mariposa 5F Dredge/Fill Site Owner 04/28/2015 None
812541 West of Yosemite Lodge Parking Mariposa 5F Dredge/Fill Site Owner 01/27/2015 None
808269 Lower Pines Campground Riverbank Stabilization Mariposa 5F Dredge/Fill Site Owner 08/07/2014 None
807189 Soda Springs Trail and Meadow Restoration Tuolumne 5F Dredge/Fill Site Owner 06/24/2014 None
797782 Tioga Road Rehabilitation Mariposa 5F Dredge/Fill Site Owner 08/13/2013 None
787293 South Entrance Station Kiosks Replacement Mariposa 5F Dredge/Fill Site Owner 10/17/2012 None
781105 Yosemite Creek Campground Bridge Replacement Mariposa 5F Dredge/Fill Site Owner 05/09/2012 None
768377 Glacier Point Road Rehabilitation Project Mariposa 5F Dredge/Fill Site Operator 07/12/2011 None
767801 Improve Forest and Meadow Habitat at Crane Flat Mariposa 5F Dredge/Fill Site Owner and Operator 06/24/2011 None
767785 Tenaya Lake East Beach Area Restoration Mariposa 5F Dredge/Fill Site Owner and Operator 06/23/2011 None
767710 Upper Pines Campground Improvements Project Mariposa 5F Dredge/Fill Site Operator 06/22/2011 None
767679 Yosemite Creek Campground Bridge Replacement project Mariposa 5F Dredge/Fill Site Operator 06/21/2011 None
767518 Reconstructing Critically Eroded Sections of El Portal Road Project Mariposa 5F Dredge/Fill Site Operator 06/15/2011 None
758111 Carlon Meadow and Riparian Restoration Tuolumne 5S Dredge/Fill Site Owner 09/16/2009 None
754294 Integrated Utilities Phase 2A & 3A Mariposa 5F Dredge/Fill Site Owner and Operator 07/01/2010 None
753987 Yosemite Valley Integrated Utility Project Phase 3B Mariposa 5F Dredge/Fill Site None None None
753800 Wawona Meadow Mariposa 5F Dredge/Fill Site None None None
636346 Rehabilitation of The Yosemite Valley Loop Rd Mariposa 5F Dredge/Fill Site Owner 06/28/2006 None
274505 White Wolf WWTF Tuolumne 5F Wastewater Treatment Facility Owner 02/23/1979 None
274504 Tuolumne Meadows WWTF Tuolumne 5F Wastewater Treatment Facility Owner 08/28/1969 None
274503 Yosemite Nat Prk Hodgdon MDW Tuolumne 5F Wastewater Treatment Facility Owner 07/16/1964 None
274495 Yosemite Institute Crane Flat Tuolumne 5F Wastewater Treatment Facility Owner 05/02/2000 None
271887 Wawona WWTF Mariposa 5F Wastewater Treatment Facility Owner 12/22/1998 None
264822 Toulumne Meadows Yosemite NP Tuolumne 5S Facility Owner 09/21/2001 None
257866 South Fork Merced River Bridge Mariposa 5F Dredge/Fill Site Owner 06/17/2005 None
251895 Receiving Waters; Merced River Mariposa 5F Dredge/Fill Site Owner 06/17/2005 None
231225 Happy Islles Dam Removal Mariposa 5S Dredge/Fill Site Owner 06/17/2005 None
227217 Glacier Point WWTF Mariposa 5F Wastewater Treatment Facility Owner 12/11/1995 None
222491 El Portal WWTF Mariposa 5F Wastewater Treatment Facility Owner 09/30/1994 None
213438 Cascades Diversion Dam Removal Mariposa 5F Dredge/Fill Site Owner 06/17/2005 None
208519 Badger Pass WWTF Mariposa 5F Wastewater Treatment Facility Owner 03/23/1979 None
Total Related Places: 67
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
655271 Gerald Roubos Person Data Submitter 05/06/2026 None None
651986 Dorothy Shreve Person Data Submitter 08/01/2025 None None
651762 Alexandro Martinez Person Data Submitter 07/15/2025 None None
651224 Ray McPadden Person Legally Responsible Official 06/16/2025 None None
650942 Raymond McPadden Person Legally Responsible Official 05/20/2025 None None
650535 Stephanie Burkhart Person Legally Responsible Official 04/23/2025 None None
650504 Mike Trumm Person Data Submitter 04/22/2025 None None
649974 Sean Bittle Person Data Submitter 03/20/2025 None None
649793 Seth Alberta Person Data Submitter 03/12/2025 None None
649793 Seth Alberta Person Data Submitter 07/14/2025 None None
596628 Rick Hall Person Legally Responsible Official 04/09/2019 None None
575158 Michael Reynolds Person Legally Responsible Official 03/28/2018 08/26/2020 None
563358 Chip Jenkins Person Legally Responsible Official 04/17/2017 08/26/2020 None
560230 Woody Smeck Person Legally Responsible Official 11/08/2016 04/25/2017 None
548027 Randall Fong Person Legally Responsible Official 08/07/2014 None None
544198 Cicely Muldoon Person Legally Responsible Official 03/18/2020 None None
530977 David Engelstad Person Legally Responsible Official 01/03/2012 None None
527504 Victor Goldman Person Facility Contact 06/24/2011 None None
527494 Sue Beatty Person Facility Contact 06/23/2011 None None
523406 Glen Rothell Person Legally Responsible Official 07/29/2011 None None
523406 Glen Rothell Person Legal representative 06/20/2011 None None
523406 Glen Rothell Person Legally Responsible Official 01/22/2009 None None
523177 Monica Buhler Person Facility Contact 05/13/2010 None None
518991 Don Neubacher Person Legally Responsible Official 10/17/2012 10/31/2016 None
518991 Don Neubacher Person Legally Responsible Official 06/24/2014 10/31/2016 None
508950 David Uberuaga Person Legally Responsible Official 09/16/2009 None None
498373 Vera Newitt Person Data Submitter 02/02/2009 08/22/2013 None
498369 Jim Radmacher Person Data Submitter 02/02/2009 08/22/2013 None
498355 George Harders Person Data Submitter 02/02/2009 04/25/2017 None
498077 Jim Fredle Person Data Submitter 01/28/2009 04/25/2017 None
498075 Susan Krause Person Data Submitter 01/28/2009 04/25/2017 None
498071 Mike Robarge Person Data Submitter 01/28/2009 04/25/2017 None
465710 Paul Laymon Person Data Submitter 07/09/2015 04/25/2017 None
330671 Michael Pieper Person Facility Contact 06/28/2006 None None
330671 Michael Pieper Person Legally Responsible Official 08/13/2013 None None
304943 Dave Shackelton Person Data Submitter 03/16/2006 None None
167180 Michael Tollefson Person Legally Responsible Official 04/06/2006 None None
Total Related Parties: 37
  
  
  
  
Expand/Contract Regulatory Measures
Regulatory Measures (non-enforcement)
Reg. Measure ID Regulatory Measure Type Region WDID Status Program Order No. RM Effective Date RM Termination Date Relationship Relationship Start Date Relationship End Date Amended?
464417 Enrollee - NPDES 5F 5C220701002 Active NPDNONMUNIPRCS R5-2022-0006-03 02/13/2026 None Discharger 03/04/2026 None N
461873 NPDES Permit 5F 5C220701002 Active NPDMUNILRG R5-2025-0031 08/01/2025 None Discharger 07/22/2025 None N
461082 Enrollee - 401 Certification 5S 5B55CR00187 Active CERREST 2022-0048-DWQ 06/20/2025 None Discharger 05/20/2025 None N
460802 Enrollee - 401 Certification 5F 5B22CR00073 Active CERFILLEXC 2004-0004-DWQ 04/25/2025 None Discharger 04/23/2025 None N
459899 401 Certification 5S 5B55CR00185 Active CERFILLEXC None 03/21/2025 None Discharger 02/05/2025 None N
458666 Enrollee - WDR 5F 5B22CR00072 Active CERFILLEXC 2004-0004-DWQ 09/26/2024 None Discharger 10/07/2024 None N
457084 Enrollee - 401 Certification 5F 5B22CR00071 Historical CERREST SB12006GN 05/30/2024 12/09/2025 Discharger 05/28/2024 None N
456718 Enrollee - WDR 5F 5B22NC00014 Active WDRMUNIOWTS 2014-0153-DWQ 05/30/2024 None Discharger 04/26/2024 None N
455763 Enrollee - 401 Certification 5S 5B55CR00181 Historical CERREST SB12006GN 02/21/2024 10/15/2024 Discharger 02/06/2024 None N
452540 Enrollee - 401 Certification 5F 5B22CR00067 Historical CERFILLEXC 2018-0025-EXEC 05/11/2023 08/10/2023 Discharger 05/08/2023 None N
452526 13267 Letter (Non-Enforcement) 5F 5C220701003 Active WDRMUNIENROTH None 04/05/2023 None Discharger 05/05/2023 None N
452522 13267 Letter (Non-Enforcement) 5F 5B55NC00002 Active WDRMUNIENROTH None 04/05/2023 None Discharger 05/05/2023 None N
452419 401 Certification 5F 5B22CR00066 Historical CERREST None 05/12/2023 12/03/2025 Discharger 04/26/2023 None N
451867 Enrollee - 401 Certification 5F 5B22CR00065 Active CERREST SB12006GN 03/29/2023 None Discharger 03/06/2023 None N
448927 401 Certification 5F 5B22CR00063 Active CERREST None 08/24/2022 None Discharger 08/22/2022 None N
448704 Enrollee - WDR 5F 5C550700003 Active WDRMUNIENROTH 2014-0153-DWQ 11/22/2021 None Discharger 11/22/2021 None N
447770 Enrollee - 401 Certification 5F 5B22CR00060 Active CERREST SB12006GN 07/12/2022 None Discharger 05/20/2022 None N
447727 Enrollee - 401 Certification 5S 5B55CR00162 Historical CERREST SB12006GN 06/28/2022 12/30/2025 Discharger 05/17/2022 None N
446621 401 Certification 5S 5B55CR00160 Active CERREST None 06/30/2022 None Discharger 02/15/2022 None N
445523 401 Certification 5F 5B55CR00157 Active CERREST None 12/17/2021 None Discharger 10/29/2021 None N
444422 401 Certification 5F 5B22CR00057 Historical CERREST None 08/27/2021 07/10/2023 Discharger 07/30/2021 None N
443434 401 Certification 5F 5B22CR00056 Historical CERREST None 07/07/2021 06/28/2023 Discharger 05/26/2021 None N
440395 Co-Permitee SB 5C220701002 Active SLIC 2020-0015-DWQ 07/09/2020 None Discharger 09/18/2020 None N
439532 WDR 5F 5C220701001 Active WDRMUNIOTH 2014-0153-DWQ-R5349 02/18/2021 None Discharger 08/06/2020 None N
439042 401 Certification 5F 5B22CR00054 Historical CERREST None 07/31/2020 12/29/2022 Discharger 07/08/2020 None N
438058 401 Certification 5F 5B22CR00052 Historical CERFILLEXC None 07/15/2020 07/15/2025 Discharger 05/13/2020 None N
438003 401 Certification 5F 5B22CR00053 Active CERFILLEXC None 06/19/2020 None Discharger 05/08/2020 None N
437344 401 Certification 5F 5B55CR00140 Historical CERFILLEXC None 04/22/2020 04/22/2025 Discharger 03/24/2020 None N
434880 NPDES Permit 5F 5C220701002 Historical NPDMUNILRG R5-2019-0069 12/01/2019 07/31/2025 Discharger 10/15/2019 None N
429964 401 Certification 5F 5B22CR00047 Historical CERFILLEXC None 07/30/2019 04/12/2023 Discharger 04/15/2019 None N
429523 401 Certification 5F 5B22CR00046 Historical CERFILLEXC None 05/22/2019 05/22/2024 Discharger 03/22/2019 None N
426068 Enrollee - 401 Certification 5F 5B22CR00043 Historical CERFILLEXC 2018-0025-EXEC 10/18/2018 02/20/2019 Discharger 11/01/2018 None N
425903 Enrollee - 401 Certification 5S 5B22CR00044 Historical CERFILLEXC 2018-0025-EXEC 10/22/2018 08/10/2023 Discharger 10/26/2018 None N
422715 Enrollee - 401 Certification 5F 5B22CR00042 Historical CERFILLEXC RGP 8 07/27/2018 08/09/2018 Discharger 07/13/2018 None N
420594 Enrollee - WDR 5F 5C220701004 Active WDRMUNIOTH 2014-0153-DWQ 08/31/2018 None Discharger 04/05/2018 None N
416010 401 Certification 5F 5B22CR00039 Historical CERREST None 05/11/2018 02/20/2019 Discharger 08/29/2017 None N
407774 Enrollee - WDR 5F 5B22NC00012 Active WDRMUNIOWTS 2014-0153-DWQ 07/08/2016 None Discharger 07/20/2016 None N
407417 401 Certification 5F 5B22CR00035 Historical CERFILLEXC None 09/23/2016 09/23/2021 Discharger 07/07/2016 None N
406149 401 Certification 5F 5B22CR00034 Historical CERREST None 08/08/2016 04/12/2023 Discharger 05/12/2016 None N
405885 401 Certification 5F 5B22CR00033 Historical CERFILLEXC None 06/02/2016 06/02/2021 Discharger 04/26/2016 None N
404275 401 Certification 5F 5B22CR00032 Historical CERFILLEXC None 05/02/2016 05/02/2021 Discharger 01/12/2016 None N
402656 401 Certification 5F 5B22CR00031 Historical CERREST None 09/30/2015 12/17/2020 Discharger 08/28/2015 None N
402043 Enrollee - WDR 5F 5B22NC00011 Active WDRMUNIOWTS 2014-0153-DWQ 07/23/2015 None Discharger 07/09/2015 None N
400695 401 Certification 5F 5B22CR00028 Historical CERREST None 07/02/2015 07/02/2019 Discharger 04/28/2015 None N
399624 401 Certification 5F 5B22CR00027 Historical CERFILLEXC None 03/13/2015 05/31/2018 Discharger 01/27/2015 None N
397612 401 Certification 5F 5B22CR00026 Historical CERREST None 08/28/2014 07/12/2017 Discharger 08/07/2014 None N
396941 401 Certification 5F 5B55CR00087 Historical CERREST None 08/15/2014 10/28/2016 Discharger 06/24/2014 None N
396396 NPDES Permit 5F 5C220701002 Historical NPDMUNILRG R5-2014-0068 08/01/2014 11/27/2019 Discharger 10/11/2012 None N
392724 401 Certification 5F 5B22CR00023 Historical CERFILLEXC None 11/17/2013 12/15/2015 Discharger 08/13/2013 None N
387774 401 Certification 5F 5B22CR00022 Historical CERFILLEXC None 10/03/2012 06/22/2017 Discharger 10/17/2012 None N
384993 401 Certification 5F None Historical CERFILLEXC None 08/13/2004 None Discharger 05/09/2012 None Y
383860 Enrollee - WDR 5F 5C550700002 Active WDRMUNIENROTH 97-010-DWQ 10/07/2011 None Discharger 03/21/2012 None N
380777 401 Certification 5S 5B55CR00051 Historical CERREST None 09/16/2009 09/16/2014 Discharger 08/10/2011 None N
380206 401 Certification 5F 5B22CR00009 Historical CERFILLEXC None 04/01/2008 06/30/2010 Discharger 07/12/2011 None N
379895 401 Certification 5F 5B22CR00017 Historical CERFILLEXC None 08/01/2011 None Discharger 05/09/2011 None N
379879 401 Certification 5F 5B22CR00016 Historical CERFILLEXC None 08/01/2011 10/25/2012 Discharger 05/09/2011 None N
379821 Enrollee - WDR 5F 5C220701003 Active WDRMUNIENROTH 97-010-DWQ 05/24/2011 None Discharger 03/23/1979 None N
379816 Enrollee - WDR 5F 5C550700003 Historical WDRMUNIENROTH 97-010-DWQ 06/06/2011 11/21/2021 Discharger 05/21/1993 None N
379792 401 Certification 5F 5B22CR00018 Historical CERFILLEXC None 09/01/2004 11/11/2010 Discharger 04/05/2004 None N
379757 401 Certification 5F 5B22CR00006 Historical CERFILLEXC None 09/01/2007 08/29/2008 Discharger 06/11/2007 None N
374787 401 Certification 5F 5B22CR00012 Historical CERFILLEXC None 01/22/2009 10/15/2009 Discharger 01/22/2009 None N
374659 401 Certification 5F 5B22CR00013 Historical CERFILLEXC None 07/01/2010 11/30/2010 Discharger 06/21/2010 None Y
374583 401 Certification 5F 5B22CR00014 Historical CERFILLEXC None 08/10/2010 None Discharger 06/23/2010 None N
373917 NPDES Permit 5F 5C220701004 Historical NPDMUNIOTH R5-2013-0092 09/18/2013 10/05/2018 Discharger 10/29/1999 None N
344473 NPDES Permit 5F 5C220701002 Historical NPDMUNILRG R5-2008-0060 06/13/2008 08/01/2014 Discharger 10/19/2001 None N
311907 401 Certification 5F 5B22CR00004 Historical CERFILLEXC None 08/28/2006 08/01/2008 Discharger 09/27/2006 None N
298725 NPDES Permit 5F 5C220701004 Historical NPDMUNIOTH R5-2005-0155 10/21/2005 09/17/2013 Discharger 10/29/1999 None Y
194875 Enrollee 5S 5B55NP00004 Historical NPDNONMUNIPRCS 5-00-175 09/26/2001 02/11/2005 Discharger 09/01/2005 None N
194873 Enrollee - WDR 5F 5B55NC00002 Historical WDRMUNIENROTH 97-010-DWQ 10/18/2000 03/26/2025 Discharger 09/01/2005 None N
173205 401 Certification 5F 5B22CR00003 Historical CERFILLEXC None None None Discharger 06/17/2005 None N
170381 401 Certification 5F 5B22CR00002 Historical CERFILLEXC None None None Discharger 06/17/2005 None N
170380 401 Certification 5F 5B22CR00001 Historical CERFILLEXC None None None Discharger 06/17/2005 None N
147429 NPDES Permit 5F 5C220701004 Historical NPDMUNIOTH 99-137 10/29/1999 10/20/2005 Discharger 10/29/1999 None N
146251 WDR 5F 5C220701001 Historical WDRMUNIOTH 96-215 08/09/1996 02/17/2021 Discharger 08/09/1996 None N
145871 NPDES Permit 5F 5C220701004 Historical NPDMUNIOTH 94-174 06/24/1994 10/29/1999 Discharger 06/24/1994 None N
145292 NPDES Permit 5F 5C220701002 Historical NPDMUNILRG 95-060 03/24/1995 10/18/2001 Discharger 03/24/1995 None N
144928 NPDES Permit 5F 5C220701004 Historical NPDMUNIOTH 79-111 04/27/1979 05/26/1989 Discharger 04/27/1979 None N
144924 WDR 5F 5C220701003 Historical WDRMUNIOTH 79-072 03/23/1979 08/05/2011 Discharger 03/23/1979 None N
144921 WDR 5F 5C220701001 Historical WDRMUNIOTH 79-048 02/23/1979 08/09/1996 Discharger 02/23/1979 None N
144381 NPDES Permit 5F 5C220701002 Historical NPDMUNILRG 90-067 03/23/1990 03/24/1995 Discharger 03/23/1990 None N
144118 NPDES Permit 5F 5C220701002 Historical NPDMUNILRG 85-008 01/25/1985 03/23/1990 Discharger 01/25/1985 None N
144077 NPDES Permit 5F 5C220701004 Historical NPDMUNIOTH 89-077 05/26/1989 06/24/1994 Discharger 05/26/1989 None N
141997 WDR 5F 5C550700001 Active WDRMUNILRG 92-015 01/24/1992 None Discharger 01/24/1992 None N
140863 WDR 5F 5C550700002 Historical WDRMUNIOTH 93-063 05/21/1993 02/02/2012 Discharger 05/21/1993 None N
140862 WDR 5F 5C550700003 Historical WDRMUNIOTH 93-062 05/21/1993 08/05/2011 Discharger 05/21/1993 None N
139321 WDR 5S 5C550700001 Historical WDRMUNILRG 73-190 04/30/1973 02/22/1979 Discharger 04/30/1973 None N
139316 WDR 5S 5C550700002 Historical WDRMUNIOTH 73-139 01/26/1973 02/22/1979 Discharger 01/26/1973 None N
139028 WDR 5S 5C550700003 Historical WDRMUNIOTH 79-045 02/23/1979 05/20/1993 Discharger 02/23/1979 None N
138995 WDR 5S 5C550700001 Historical WDRMUNILRG 79-044 02/23/1979 01/23/1992 Discharger 02/23/1979 None N
138994 WDR 5S 5C550700002 Historical WDRMUNIOTH 79-043 02/23/1979 05/20/1993 Discharger 02/23/1979 None N
138872 WDR 5S 5C550700001 Historical WDRMUNILRG 70-017 08/28/1969 04/29/1973 Discharger 08/28/1969 None N
138821 WDR 5S 5C550700002 Historical WDRMUNIOTH 64-102 07/16/1964 01/25/1973 Discharger 07/16/1964 None N
131128 NPDES Permit 5F 5C220701002 Historical NPDMUNILRG 5-01-243 10/19/2001 04/24/2008 Discharger 10/19/2001 None N
Total Regulatory Measures: 93
  
  
  
  
Expand/Contract Violations
Violations within the past year
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.
1153580 03/31/2026 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1153579 03/31/2026 Deficient Monitoring Influent flow metering data is unavailable in March 2026 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1153578 03/31/2026 Deficient Monitoring The discharge flow meter calibration was not completed for the calendar year 2025. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1153577 03/31/2026 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1153576 03/31/2026 Deficient Monitoring Influent flow metering data is unavailable in March 2026 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1153575 09/30/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 434880 R5-2019-0069 N
1153574 09/30/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 434880 R5-2019-0069 N
1153564 12/31/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 434880 R5-2019-0069 N
1153563 12/31/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 434880 R5-2019-0069 N
1152933 12/31/2025 Deficient Monitoring Influent flow metering data was unavailable July- December 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1152932 12/31/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1152931 02/28/2026 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1152930 02/28/2026 Deficient Reporting A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1152710 01/31/2026 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1152709 01/31/2026 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1152639 03/02/2026 Late Report Monthly SMR ( MONNPDES ) (Monthly SMR) report for January 2026 (3094071) was due on 01-MAR-26 Violation None Report El Portal WWTF 461873 R5-2025-0031 N
1152227 02/02/2026 Late Report Annual SMR ( TECHRPT ) (Annual Operations Report) report for 2025 (3098212) was due on 01-FEB-26 Violation None Report El Portal WWTF 461873 R5-2025-0031 N
1151663 02/02/2026 Late Report Annual SMR ( TECHRPT ) (Annual Operations Report) report for 2025 (3094069) was due on 01-FEB-26 Violation None Report El Portal WWTF 461873 R5-2025-0031 N
1151611 12/31/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1151610 12/31/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1151609 12/31/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1151608 12/31/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1151607 12/31/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1151606 12/31/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1151274 02/02/2026 Late Report Monthly SMR ( MONNPDES ) (Monthly SMR) report for December 2025 (3032538) was due on 01-FEB-26 Violation None Report El Portal WWTF 461873 R5-2025-0031 N
1151252 01/31/2026 Late Report Annual SMR ( MONNPDES ) (Chronic WET Test) report for 2025 (2269172) was due on 30-JAN-26 Violation None Report El Portal WWTF 434880 R5-2019-0069 N
1151251 01/31/2026 Late Report Quarterly SMR ( MONNPDES ) (Acute WET Test) report for Q4 2025 (3027486) was due on 30-JAN-26 Violation None Report El Portal WWTF 461873 R5-2025-0031 N
1151250 01/31/2026 Late Report Annual SMR ( MONNPDES ) (Chronic WET Test) report for 2025 (3027487) was due on 30-JAN-26 Violation None Report El Portal WWTF 461873 R5-2025-0031 N
1150037 09/30/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1150036 09/30/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1150035 11/30/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1150034 11/30/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1149955 10/31/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1149954 10/31/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1149953 09/30/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1149952 09/30/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1149951 12/02/2025 Late Report Monthly SMR ( MONNPDES ) (Monthly SMR) report for October 2025 (3027490) was due on 01-DEC-25 Violation None Report El Portal WWTF 461873 R5-2025-0031 N
1149406 11/02/2025 Late Report Monthly SMR ( MONNPDES ) (Monthly SMR) report for September 2025 (3027489) was due on 01-NOV-25 Violation None Report El Portal WWTF 461873 R5-2025-0031 N
1149354 10/31/2025 Late Report Quarterly SMR ( MONNPDES ) (Acute WET Test) report for Q3 2025 (2269170) was due on 30-OCT-25 Violation None Report El Portal WWTF 434880 R5-2019-0069 N
1149352 10/31/2025 Late Report Quarterly SMR ( MONNPDES ) (Acute WET Test) report for Q3 2025 (3027485) was due on 30-OCT-25 Violation None Report El Portal WWTF 461873 R5-2025-0031 N
1148301 06/30/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 434880 R5-2019-0069 N
1148300 06/30/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 434880 R5-2019-0069 N
1148297 05/31/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 434880 R5-2019-0069 N
1148296 05/31/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 434880 R5-2019-0069 N
1147225 08/31/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1147224 08/31/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 461873 R5-2025-0031 N
1147223 07/31/2025 Deficient Monitoring Influent flow metering data is unavailable in July 2025 due to automated metering equipment failure. Influent calculations based on flow are unable to be calculated during this period. This includes weekly biochemical oxygen demand loading and weekly suspended solids loading calculations. Violation N eSMR El Portal WWTF 434880 R5-2019-0069 N
1147222 07/31/2025 Deficient Monitoring A SCADA system error resulted in the failure to collect all the daily UV minimum, daily average, and weekly average dosing data in the month. Daily grab data from the UV disinfection equipment indicates the equipment is functioning. Violation N eSMR El Portal WWTF 434880 R5-2019-0069 N
1147210 09/02/2025 Late Report Monthly SMR ( MONNPDES ) (Monthly SMR) report for July 2025 (2269179) was due on 01-SEP-25 Violation None Report El Portal WWTF 434880 R5-2019-0069 N
1146056 08/02/2025 Late Report Monthly SMR ( MONNPDES ) (Monthly SMR) report for June 2025 (2269178) was due on 01-AUG-25 Violation None Report El Portal WWTF 434880 R5-2019-0069 N
1145970 07/31/2025 Late Report Quarterly SMR ( MONNPDES ) (Acute WET Test) report for Q2 2025 (2269169) was due on 30-JUL-25 Violation None Report El Portal WWTF 434880 R5-2019-0069 N
1144840 07/02/2025 Late Report Monthly SMR ( MONNPDES ) (Monthly SMR) report for May 2025 (2269177) was due on 01-JUL-25 Violation None Report El Portal WWTF 434880 R5-2019-0069 N
1144008 06/02/2025 Late Report Monthly SMR ( MONNPDES ) (Monthly SMR) report for April 2025 (2269176) was due on 01-JUN-25 Violation None Report El Portal WWTF 434880 R5-2019-0069 N
Report defaults to display violations within the last year. Click here to see last five years of violations. Refer to the Interactive Violation Report for more data.
Total Violations: 53
*Click the "(+/-) Violation Description" link to expand and contract the violation description.
  
  
  
  
Expand/Contract Enforcement Actions
Enforcement Actions
Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status
461909 Time Schedule Order R5-2025-0035 TSO R5-2025-0035 for USDI National Park Service Yosemite National Park NPDMUNILRG 08/01/2025 Active
460383 Staff Enforcement Letter None SEL 03/11/2025 for USDI National Park Service Yosemite National Park NPDMUNILRG 03/11/2025 Historical
417009 Notice of Violation None NOV 10/13/2017 for USDI National Park Service Yosemite National Park NPDMUNIOTH 10/13/2017 Active
405941 Notice of Violation None NOV 04/22/2016 for USDI National Park Service Yosemite National Park NPDMUNILRG 04/22/2016 Active
404054 Oral Communication None Oral Com 12/16/2015 for USDI National Park Service Yosemite National Park NPDMUNILRG 12/16/2015 Historical
402252 Notice of Violation None NOV 07/17/2015 for USDI National Park Service Yosemite National Park NPDMUNIOTH 07/17/2015 Historical
392508 Time Schedule Order R5-2013-0093 TSO R5-2013-0093 for USDI National Park Service Yosemite NPDMUNIOTH 07/25/2013 Historical
381828 Notice of Violation None NOV 1/26/2012 for USDI NPS YOSEMITE El Portal WWTF NPDMUNILRG 01/26/2012 Historical
381419 Time Schedule Order R5-2011-0906 TSO R5-2011-0906 for USDI, NPS, Yosemite El Portal WWTF NPDMUNILRG 09/15/2011 Historical
376787 Staff Enforcement Letter None SEL 12/03/2010 for USDI, NPS, Yosemite El Portal WWTF NPDMUNILRG 12/03/2010 Historical
375277 Staff Enforcement Letter None SEL 07/13/2010 for USDI NPS Yosemite Wawona El Portal WWTF (7/20/10 & 9/1/10) NPDMUNIOTH 07/13/2010 Historical
374943 Staff Enforcement Letter None SEL 07/13/2010 for USDI NPS Yosemite Wawona El Portal WWTF (7/20/10 & 9/1/10) NPDMUNIOTH 07/13/2010 Historical
374942 Staff Enforcement Letter None SEL 07/13/2010 for USDI NPS Yosemite El Portal WWTF (7/20/10 & 9/1/10) NPDMUNILRG 07/13/2010 Historical
367715 Notice of Violation None NOV 07/14/2009 for USDI NPS Wawona WWTF NPDMUNIOTH 04/08/2009 Active
367606 Notice of Violation None NOV 03/05/2009 for USDI NPS Yosemite El Portal WWTF NPDMUNILRG 03/05/2009 Historical
255219 Staff Enforcement Letter None SEL 03/22/2000 for USDI NPS Yosemite, Glacier Point WWTF WDRMUNIOTH 03/22/2000 Historical
251862 Oral Communication None Oral Com 05/06/2004 for USDI Yosemite, Badger Pass WWTF WDRMUNIOTH 05/06/2004 Historical
248627 Staff Enforcement Letter None SEL to USDI Yosemite El Portal WWTF NPDMUNILRG 04/15/2002 Historical
229981 13267 Letter None 13267 Letter 07/14/1999 for USDI Yosemite El Portal WWTF NPDMUNILRG 07/14/1999 Historical
229075 Clean-up and Abatement Order 5-00-703 CAO 5-00-703 for USDI Yosemite El Portal WWTF NPDMUNILRG 08/02/2000 Active
228903 Time Schedule Order 5-00-210 TSO 5-00-210 to USDI Yosemite El Portal WWTF NPDMUNILRG 09/15/2000 Active
Total Enforcement Actions: 21
  
  
  
  
Expand/Contract Enforcement Actions
Regulatory Measures linked to Related Parties
Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status
Total Regulatory Measures linked to Related Parties: 0
  
  
The current report was generated with data as of: 05/20/2026
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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