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California Integrated Water Quality System Project (CIWQS)
   Party At-A-Glance Report

  
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General Information
Party ID Party Name Party Classification Mailing Address Work Phone Email/Website
604642 David Ernst 8400 Windsor Road Windsor, CA 95492 707-383-5328 dernst@townofwindsor.com
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
Total Related Places: 0
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
51027 Windsor Water District Organization Legally Responsible Official 12/05/2019 None Special District
41499 Sonoma County Water Agency (SCWA) Organization Legally Responsible Official 07/14/2025 None County Agency
Total Related Parties: 2
  
  
  
  
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?
Total Regulatory Measures: 0
  
  
  
  
Expand/Contract Violations
Violations within the past five 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.
1103460 03/11/2022 CAT1 Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Weekly Average limit is 15 m Violation N eSMR Windsor Wastewater Treatment, Reclamation, and Disposal Facility 427515 R1-2020-0010 N
1095346 10/02/2021 Late Report Annual SMR ( TECHRPT ) (Compliance Schedule for the Final Effluent Limitation fo Violation None Report Windsor Wastewater Treatment, Reclamation, and Disposal Facility 427515 R1-2020-0010 N
1118753 05/22/2023 OEV Total Coliform Daily Minimum limit is 1 t/day and reported value was 0 t/day at Violation N eSMR Windsor Wastewater Treatment, Reclamation, and Disposal Facility 427515 R1-2020-0010 N
1095347 10/02/2021 Late Report Annual SMR ( TECHRPT ) (Final Effluent Limitation for Total Phosphorus Complianc Violation None Report Windsor Wastewater Treatment, Reclamation, and Disposal Facility 427515 R1-2020-0010 N
Report currently showing last five years of violations. Click here to return to viewing one year of violations. Refer to the Interactive Violation Report for more data.
Total Violations: 4
*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
Total Enforcement Actions: 0
  
  
  
  
Expand/Contract Enforcement Actions
Regulatory Measures linked to Related Parties
Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status
389154 Sonoma County Water Agency (SCWA) Co-Permitee NPDMUNILRG 01/01/2013 Active
300316 Windsor Water District Enrollee - WDR SSOMUNILRG 11/06/2006 Active
416678 Sonoma County Water Agency (SCWA) Enrollee - NPDES NPDNONMUNIPRCS 07/01/2016 Active
420178 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 06/07/2018 Active
300279 Sonoma County Water Agency (SCWA) Enrollee - WDR SSOMUNISML 10/16/2006 Active
402980 Sonoma County Water Agency (SCWA) Enrollee - WDR REC 06/27/2019 Active
423602 Sonoma County Water Agency (SCWA) WDR WDRMUNILRG 07/01/2019 Active
447308 Sonoma County Water Agency (SCWA) Enrollee - Waiver WDRMUNIENROTH 06/14/2022 Active
300108 Sonoma County Water Agency (SCWA) Enrollee - WDR SSOMUNISML 10/16/2006 Active
300111 Sonoma County Water Agency (SCWA) Enrollee - WDR SSOMUNISML 10/16/2006 Active
436540 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 05/12/2020 Active
441712 Sonoma County Water Agency (SCWA) WDR CERFILLEXC 12/10/2020 Active
452960 Sonoma County Water Agency (SCWA) Enrollee - 401 Certification CERFILLEXC 06/23/2023 Active
300283 Sonoma County Water Agency (SCWA) Enrollee - WDR SSOMUNISML 10/16/2006 Active
376807 Sonoma County Water Agency (SCWA) 401 Certification CERREST 05/14/2014 Active
138699 Sonoma County Water Agency (SCWA) WDR WDRMUNIOTH 03/28/1996 Active
300103 Sonoma County Water Agency (SCWA) Enrollee - WDR SSOMUNISML 10/16/2006 Active
407112 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 10/27/2017 Active
433463 Sonoma County Water Agency (SCWA) WDR WDRMUNIOTH 06/20/2019 Active
437072 Sonoma County Water Agency (SCWA) Individual Monitoring Requirem REC 06/27/2019 Active
440047 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 02/01/2021 Active
456483 Sonoma County Water Agency (SCWA) Enrollee - Waiver CERFILLEXC 05/21/2024 Active
437645 Sonoma County Water Agency (SCWA) 401 Certification CERREST 07/14/2020 Active
300117 Sonoma County Water Agency (SCWA) Enrollee - WDR SSOMUNISML 10/16/2006 Active
300360 Sonoma County Water Agency (SCWA) Enrollee SSOMUNISML 10/16/2006 Active
300361 Sonoma County Water Agency (SCWA) Enrollee SSOMUNILRG 10/16/2006 Active
369878 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 07/23/2009 Active
392736 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 07/10/2014 Active
427524 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 08/01/2021 Active
461037 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 05/29/2025 Active
459395 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNILRG 02/01/2025 Active
407111 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 10/27/2017 Active
457952 Sonoma County Water Agency (SCWA) Enrollee - 401 Certification CERFILLEXC 10/01/2024 Active
440248 Windsor Water District Co-Permitee SLIC 07/09/2020 Active
427515 Windsor Water District NPDES Permit NPDMUNILRG 10/01/2020 Active
404763 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 05/09/2016 Active
139063 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 10/27/1994 Historical
141015 Sonoma County Water Agency (SCWA) Reclamation Requirements REC 04/15/1987 Historical
347600 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 08/27/2008 Historical
348450 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 08/08/2006 Historical
349042 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 04/17/2006 Historical
360533 Sonoma County Water Agency (SCWA) Co-Permitee NPDMUNILRG 03/01/2008 Historical
362635 Sonoma County Water Agency (SCWA) WDR CERFILLEXC 07/23/2009 Historical
378528 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 06/01/2009 Historical
379068 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 08/03/2011 Historical
412229 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 05/17/2017 Historical
137523 Sonoma County Water Agency (SCWA) WDR WDRMUNILRG 11/25/1984 Historical
137887 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 07/27/1989 Historical
147408 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNILRG 10/21/1998 Historical
331310 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 03/20/2009 Historical
347764 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 09/02/2008 Historical
348542 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 10/19/2006 Historical
349137 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 06/21/2008 Historical
377936 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 10/30/2009 Historical
378147 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 09/22/2009 Historical
378829 Sonoma County Water Agency (SCWA) Co-Permitee NPDMUNILRG 04/01/2011 Historical
382828 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 05/10/2012 Historical
392348 Sonoma County Water Agency (SCWA) Enrollee - 401 Certification CERFILLEXC 07/22/2010 Historical
396238 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNILRG 07/01/2014 Historical
419472 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 09/18/2018 Historical
136708 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 04/22/1982 Historical
137114 Sonoma County Water Agency (SCWA) WDR WDRMUNIOTH 05/07/1986 Historical
137115 Sonoma County Water Agency (SCWA) WDR WDRMUNILRG 06/27/1986 Historical
137505 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 05/31/1984 Historical
137773 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 05/28/1992 Historical
138081 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 08/24/1995 Historical
140965 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNILRG 11/19/1986 Historical
145535 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNILRG 07/15/1981 Historical
179202 Sonoma County Water Agency (SCWA) Co-Permitee MNSTW1 10/01/2009 Historical
179210 Sonoma County Water Agency (SCWA) Enrollee NPDNONMUNIPRCS 04/01/2003 Historical
260638 Sonoma County Water Agency (SCWA) Letter NPDESWW 04/27/2001 Historical
260639 Sonoma County Water Agency (SCWA) Letter NPDESWW 04/27/2001 Historical
261010 Sonoma County Water Agency (SCWA) Letter WDR 03/17/2003 Historical
261189 Sonoma County Water Agency (SCWA) Letter NPDESWW 09/27/2004 Historical
324858 Sonoma County Water Agency (SCWA) Enrollee NPDNONMUNIPRCS 06/19/2007 Historical
435492 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC None Historical
452504 Sonoma County Water Agency (SCWA) Enrollee - WDR CERFILLEXC 05/18/2023 Historical
132342 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 12/25/2003 Historical
137954 Sonoma County Water Agency (SCWA) WDR WDR 12/10/1992 Historical
139182 Sonoma County Water Agency (SCWA) WDR WDRMUNIOTH 08/27/1997 Historical
142324 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNILRG 06/17/1992 Historical
147680 Sonoma County Water Agency (SCWA) WDR WDR 05/25/2000 Historical
172238 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 04/25/2003 Historical
179231 Sonoma County Water Agency (SCWA) Enrollee NPDNONMUNIPRCS 05/24/2004 Historical
261120 Sonoma County Water Agency (SCWA) Letter NPDESWW 12/29/2003 Historical
384002 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 06/20/2012 Historical
387488 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 02/01/2013 Historical
136684 Sonoma County Water Agency (SCWA) WDR CERFILLEXC 08/27/1981 Historical
137116 Sonoma County Water Agency (SCWA) WDR WDRMUNIOTH 06/27/1986 Historical
148564 Sonoma County Water Agency (SCWA) WDR WDRMUNILRG 06/28/2001 Historical
176653 Sonoma County Water Agency (SCWA) Enrollee - NPDES NPDNONMUNIPRCS 01/31/2014 Historical
261038 Sonoma County Water Agency (SCWA) Letter WDR 05/14/2003 Historical
375188 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 10/12/2010 Historical
437314 Sonoma County Water Agency (SCWA) Enrollee - 401 Certification CERFILLEXC 02/26/2020 Historical
132071 Sonoma County Water Agency (SCWA) WDR WDR 03/27/2003 Historical
137174 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 05/28/1987 Historical
137394 Sonoma County Water Agency (SCWA) WDR WDRMUNIOTH 01/25/1979 Historical
137639 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 04/28/1988 Historical
137968 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 05/27/1993 Historical
172753 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 05/06/2004 Historical
176692 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 06/30/2006 Historical
261055 Sonoma County Water Agency (SCWA) Letter WDR 08/06/2003 Historical
261255 Sonoma County Water Agency (SCWA) Letter NPDESWW 10/15/1998 Historical
348545 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 07/19/2006 Historical
377661 Sonoma County Water Agency (SCWA) Letter WDR 02/17/2011 Historical
396675 Sonoma County Water Agency (SCWA) Enrollee NPDNONMUNIPRCS 01/31/2014 Historical
414345 Sonoma County Water Agency (SCWA) Enrollee - 401 Certification CERFILLEXC 12/28/2017 Historical
432957 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNILRG 09/01/2019 Historical
136980 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 02/24/1983 Historical
138314 Sonoma County Water Agency (SCWA) WDR WDRMUNILRG 01/27/1994 Historical
169935 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 07/26/2002 Historical
179217 Sonoma County Water Agency (SCWA) Enrollee NPDNONMUNIPRCS 12/04/2003 Historical
260637 Sonoma County Water Agency (SCWA) Letter NPDESWW 04/27/2001 Historical
261137 Sonoma County Water Agency (SCWA) Letter NPDESWW 02/03/2004 Historical
261257 Sonoma County Water Agency (SCWA) Letter NPDESWW 10/15/1998 Historical
341547 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNILRG 12/01/2008 Historical
347780 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 08/09/2008 Historical
348454 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC None Historical
363151 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 04/13/2009 Historical
375586 Sonoma County Water Agency (SCWA) Enrollee NPDNONMUNIPRCS 05/04/2006 Historical
392149 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNIOTH 05/01/2014 Historical
392445 Sonoma County Water Agency (SCWA) Enrollee - 401 Certification CERFILLEXC 04/16/2010 Historical
460101 Sonoma County Water Agency (SCWA) Enrollee - 401 Certification CERFILLEXC 05/06/2025 Historical
170324 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 07/03/2002 Historical
261023 Sonoma County Water Agency (SCWA) Letter WDR 04/23/2003 Historical
261093 Sonoma County Water Agency (SCWA) Letter WDR 11/21/2003 Historical
261172 Sonoma County Water Agency (SCWA) Letter NPDESWW 07/15/2004 Historical
347638 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 09/03/2008 Historical
348451 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 11/14/2006 Historical
349119 Sonoma County Water Agency (SCWA) 401 Certification CERFILLEXC 10/03/2005 Historical
446863 Sonoma County Water Agency (SCWA) Enrollee - WDR CERFILLEXC 03/14/2022 Historical
131927 Sonoma County Water Agency (SCWA) NPDES Permit NPDMUNILRG 03/20/2002 Historical
137718 Sonoma County Water Agency (SCWA) WDR WDR 08/22/1991 Historical
137719 Sonoma County Water Agency (SCWA) WDR WDRMUNIOTH 08/22/1991 Historical
138622 Sonoma County Water Agency (SCWA) WDR WDRMUNILRG 05/23/1990 Historical
261160 Sonoma County Water Agency (SCWA) Letter NPDESWW 05/05/2004 Historical
261405 Sonoma County Water Agency (SCWA) Enrollee NPDNONMUNIPRCS 12/04/2003 Historical
137290 Windsor Water District NPDES Permit NPDMUNILRG 08/16/1990 Historical
171006 Windsor Water District Enrollee MNSTW2 11/22/2005 Historical
173237 Windsor Water District 401 Certification CERFILLEXC 06/09/2005 Historical
332505 Windsor Water District Enrollee NPDNONMUNIPRCS 08/03/2007 Historical
361001 Windsor Water District Enrollee NPDNONMUNIPRCS 02/05/2009 Historical
382410 Windsor Water District NPDES Permit NPDMUNILRG 02/01/2014 Historical
260626 Windsor Water District Letter NPDESWW 04/27/2001 Historical
136707 Windsor Water District NPDES Permit NPDMUNILRG 04/22/1982 Historical
137702 Windsor Water District NPDES Permit NPDMUNILRG 05/23/1991 Historical
173704 Windsor Water District 401 Certification CERFILLEXC 06/06/2005 Historical
131336 Windsor Water District NPDES Permit NPDMUNILRG 01/24/2002 Historical
151638 Windsor Water District 401 Certification CERFILLEXC 03/06/2001 Historical
169121 Windsor Water District 401 Certification CERFILLEXC 08/02/2002 Historical
170161 Windsor Water District 401 Certification CERFILLEXC 08/15/2002 Historical
378093 Windsor Water District 401 Certification CERFILLEXC 03/30/2011 Historical
137181 Windsor Water District NPDES Permit NPDMUNILRG 03/26/1987 Historical
138703 Windsor Water District NPDES Permit NPDMUNILRG 05/23/1996 Historical
323890 Windsor Water District NPDES Permit NPDMUNILRG 06/14/2007 Historical
Total Regulatory Measures linked to Related Parties: 155
  
  
The current report was generated with data as of: 11/07/2025
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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