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California Integrated Water Quality System Project (CIWQS)
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Place ID 273207 		  
  
  
  
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General Information
Region Place ID Place Name Place Type Place Address Place County
5F 273207 Mariposa WWTP Wastewater Treatment Facility 4956 Miller Mariposa, CA, 95338 Mariposa
Expand/Contract Related Parties
Related Parties
Party Party Type Party Name Role Classification Relationship Start Date Relationship End Date
625763 Person Justin Thomas Sherrill` Is A Data Submitter For 06/24/2021 04/04/2022
520904 Person Chris Toledo Is Onsite Manager For 06/10/2020
607444 Person Susan A Wages Is Onsite Manager For 04/08/2020
578844 Person Edwin Appling Is Onsite Manager For 06/22/2018 01/12/2023
500462 Person Curt Farrell Is Onsite Manager For 02/25/2009
117198 Person Mark Rowney Is Onsite Manager For 02/25/2009 01/12/2023
117198 Person Mark Rowney Contact 06/17/2005 01/12/2023
27814 Organization Mariposa PUD Owner Special District 04/22/1999
Total Related Parties: 8
Expand/Contract Regulatory Measures
Regulatory Measures
Reg Measure ID Reg Measure Type Region Program Order No. WDID Effective Date Expiration Date Status Amended?
441902 Enrollee - NPDES 5F NPDMUNIOTH R5-2023-0025 5C221012001 04/01/2021 10/01/2028 Active N
385864 NPDES Permit 5F NPDMUNIOTH R5-2014-0042 5C221012001 05/01/2014 04/30/2019 Historical Y
377214 Letter 5F NPDESWW 5C221012001 01/20/2011 Historical N
343180 NPDES Permit 5F NPDMUNIOTH R5-2007-0171 5C221012001 01/25/2008 12/04/2012 Historical Y
147829 NPDES Permit 5F NPDMUNIOTH 00-122 5C221012001 06/16/2000 06/16/2005 Historical N
145003 NPDES Permit 5F NPDMUNIOTH 94-294 5C221012001 10/28/1994 10/28/1999 Historical N
144098 NPDES Permit 5F NPDMUNIOTH 89-194 5C221012001 10/27/1989 10/01/1994 Historical N
144115 NPDES Permit 5F NPDMUNIOTH 84-142 5C221012001 11/28/1984 10/30/1989 Historical N
Total Reg Measures: 8
Expand/Contract Violations
Violations
Violation ID Occurred Date Violation Type (-) Violation Description Corrective Action Status Classification Source
1152648 01/04/2026 Other Water Code Sections January 2026: Failure to file a report of waste discharge. Violation of CWC section 13260. Violation B Report
1152645 01/04/2026 Order Conditions Unauthorized bypass of partially treated waste to a surface water from 4 January to 5 January 2026. Violation of Municipal General Order, Attachment D sections I.G.3.a and I.G.3.b. Violation B Report
1152649 01/04/2026 UAUTHDISC January 2026: Unauthorized discharge prior to compliance with CWC section 13260. Violation of CWC section 13264. Violation B Report
1152647 01/04/2026 UAUTHDISC Unauthorized discharge of partially treated waste to a water of the United States from 4 January to 5 January 2026. Violation of CWC section 13376 and CWA section 301. Violation B Report
1151615 01/04/2026 Surface Water See attached file See attached file Violation U eSMR
1143421 02/13/2025 Other Water Code Sections Failure to file a report of waste discharge. Violation of CWC section 13260. Violation B Inspection
1143415 02/13/2025 Order Conditions Unauthorized bypass of partially treated waste to a surface water from 02/13/2025 to 02/14/2025 and 03/18/2025. Violation of Order sections I.G.3.a - b per Attachment D. Violation B Inspection
1143419 02/13/2025 UAUTHDISC Unauthorized discharge of partially treated waste to a water of the United States from 02/13/2025 to 02/14/2025 and 03/18/2025. Discharging without filing a report of waste discharge. Violation of CWC section 13376 and CWA section 301. Violation B Inspection
1143424 02/13/2025 UAUTHDISC Unauthorized discharge prior to compliance with CWC section 13260. Violation of CWC section 13264. Violation B Inspection
1145339 02/13/2025 Surface Water See attached files. See attached files. Violation U eSMR
1118422 12/31/2021 OEV Flow Maximum Daily (MDEL) limit is 0.61 MGD and reported value was 0.80 MGD. Violation B Report
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
Total Violations: 11 Priority Violations: 0
*Click the "(+/-) Violation Description" link to expand and contract the violation description.
*As of 5/20/2010, the Water Board's Enforcement Policy requires that all violations be classified as 1, 2 or 3, with class 1 being the highest. Prior to this, violations were simply classified as Yes or No. If a 123 classification has been assigned to a violation that occurred before this date, that classification data will be displayed instead of the Yes/No data.
Violation Types
Order Conditions = Order Conditions OEV = Other Effluent Violation
Other Water Code Sections = Other Water Code Sections Surface Water = Surface Water
UAUTHDISC = Unauthorized Discharge
Expand/Contract Enforcement Actions
Enforcement Actions
Enf Id Enf Type Enf Order No. Effective Date Status
464535 Notice of Violation null 02/24/2026 Active
461162 Notice of Violation null 05/27/2025 Active
452629 Notice of Violation null 05/16/2023 Active
416806 Time Schedule Order R5-2017-0105 10/20/2017 Historical
405821 Notice of Violation null 04/15/2016 Historical
404896 Expedited Payment Letter R5-2016-0509 03/02/2016 Withdrawn
395540 Time Schedule Order R5-2014-0043 05/17/2014 Historical
387497 Admin Civil Liability R5-2013-0590 12/30/2013 Historical
393249 Notice of Violation 09/18/2013 Historical
380274 Time Schedule Order R5-2011-0905 07/13/2011 Historical
378439 Notice of Violation null 04/18/2011 Historical
375015 Staff Enforcement Letter 07/26/2010 Historical
351461 Notice of Violation 09/04/2008 Historical
248982 13267 Letter 06/04/2002 Historical
238355 13267 Letter 11/28/2001 Historical
Total Enf Actions: 15
Expand/Contract Inspections
Inspections
Inspection ID Inspection Type Lead Inspector Actual End Date Planned Violations Attachment
60138631 Complaint inspection Jennifer Dolores 03/18/2025 N 1 Download
60138630 Complaint inspection Mario Jaramillo 02/14/2025 N 0 N/A
52261184 B Type compliance inspection W Dale Harvey 06/29/2023 N 0 N/A
31934448 B Type compliance inspection Gurjot S Chahal 03/23/2018 N 0 N/A
24232081 B Type compliance inspection Matt Scroggins (Multiple) 02/24/2016 N 6 Download
2913261 Complaint inspection Aide Ortiz (Multiple) 09/30/2010 N 0 Download
2912702 B Type compliance inspection Aide Ortiz (Multiple) 09/30/2010 Y 2 [Attachments]
1389356 Prerequirement inspection Debra Mahnke 07/03/2007 N 0 N/A
335311 B Type compliance inspection Jack Yamauchi 03/05/2004 Y 0 N/A
300197 A Type compliance inspection Jon Risinger 02/07/2002 Y 0 N/A
300196 B Type compliance inspection Jon Risinger 06/13/2001 Y 0 N/A
300201 A Type compliance inspection Carlon Schrieve 06/16/1998 Y 0 N/A
300198 A Type compliance inspection Larry Lowe 05/30/1997 Y 0 N/A
300202 A Type compliance inspection Larry Lowe 06/25/1996 Y 0 N/A
300199 A Type compliance inspection Larry Lowe 05/09/1995 Y 0 N/A
300200 A Type compliance inspection Larry Lowe 06/20/1994 Y 0 N/A
Total Inspections: 16 Last Inspection: 03/18/2025
  
The current report was generated with data as of: 05/08/2026
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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