Welcome to California
California Home
Welcome to California - images of Golden Gate Bridge, ocean sunset, waterfall, flowers, and city skyline California Home Welcome to the California Environmental Protection Agency
California Integrated Water Quality System Project (CIWQS)
   Party At-A-Glance Report

  
   [VIEW PRINTER FRIENDLY VERSION] [EXPORT THIS REPORT TO EXCEL]

  
  
  
  
  
General Information
Party ID Party Name Party Classification Mailing Address Work Phone Email/Website
26240 San Luis Obispo CSA #9 Los Osos WTP County Agency 1055 Monterey Street 207 San Luis Obispo, CA 93408 None None
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
822816 Los Osos Water Recycling Facility San Luis Obispo 3 Wastewater Treatment Facility Owner 10/22/1996 None
Total Related Places: 1
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
572167 Rosalyn Piza Person Data Submitter 01/11/2018 09/01/2022 None
551362 Misty Pontes Person Legally Responsible Official 03/30/2016 None None
551333 Charles Christian Person Legally Responsible Official 10/11/2016 None None
389345 Faith Zenker Person Legally Responsible Official 04/26/2016 None None
389145 Kenneth Pang Person Legally Responsible Official 03/30/2016 None None
Total Related Parties: 5
  
  
  
  
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?
384782 13267 Letter (Non-Enforcement) 3 3 400910371 Historical WDR None 07/01/2012 08/08/2022 Discharger 04/27/2012 None N
395289 Enrollee 3 None Historical WDRNONMUNIPRCS R3-2014-0041 05/20/2013 09/20/2019 Discharger 03/10/2014 None N
379559 WDR 3 3 400910371 Active WDRMUNILRG R3-2011-0001 05/05/2011 None Discharger 02/07/2003 None N
131790 WDR 3 3 401078001 Historical WDRMUNIOTH R3-2003-0007 02/07/2003 07/14/2011 Discharger 02/07/2003 None N
440285 Co-Permitee SB 3 400910371 Active SLIC 2020-0015-DWQ 07/09/2020 None Discharger 09/18/2020 None N
131791 Resolution 3 3 401078001 Historical WDRMUNIOTH 03-006 02/07/2003 02/07/2003 Discharger 02/07/2003 None N
Total Regulatory Measures: 6
  
  
  
  
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.
1146353 04/07/2025 Surface Water Composite BOD exceeded 17 ppm on 4/7/2025. Violation None eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1146350 05/28/2025 OEV Turbidity 1-Hour Average (Mean) limit is 2 NTU and reported value was 02.27 NTU at EFF-001. Violation None eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144786 12/09/2024 CAT1 UV Transmittance Daily Minimum limit is 55.0 % and reported value was 53.9 % at EFF-001. Violation None eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144785 12/08/2024 CAT1 UV Transmittance Daily Minimum limit is 55.0 % and reported value was 51.9 % at EFF-001. Violation None eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144784 12/03/2024 CAT1 UV Transmittance Daily Minimum limit is 55.0 % and reported value was 51.9 % at EFF-001. Violation None eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144783 12/02/2024 CAT1 UV Transmittance Daily Minimum limit is 55.0 % and reported value was 54.8 % at EFF-001. Violation None eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144782 12/01/2024 CAT1 UV Transmittance Daily Minimum limit is 55.0 % and reported value was 53.8 % at EFF-001. Violation None eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144769 09/10/2024 OEV Total Coliform 7-Day Average (Mean) limit is 2.2 CFU/100 mL and reported value was 4.1 CFU/100 mL at EFF-001. Violation None eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144767 09/03/2024 CAT2 Total Trihalomethanes (TTHM) 30-Day Average of Daily Maximums limit is 80000.0 ug/L and reported value was 175800.0 ug/L at EFF-001. Violation None Report Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144766 08/05/2024 CAT2 Total Trihalomethanes (TTHM) 30-Day Average of Daily Maximums limit is 80000.0 ug/L and reported value was 142800.0 ug/L at EFF-001. Violation None Report Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144765 07/01/2024 CAT2 Total Trihalomethanes (TTHM) 30-Day Average of Daily Maximums limit is 80000.0 ug/L and reported value was 139500.0 ug/L. Violation None Report Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144753 12/01/2024 Order Conditions During the month of December LOWRF was experiencing low online UVT%. On seven different days were saw numbers below 55%. We noticed that our grab samples were greater then 2% from our online analyzer. Once we adjusted the online probe to match our bench top grab the UVT% seem to be holding about 55%. However, water was still being delivered to users downstream. Online UVT% Below 55%- 12/1/2024- 53.8% 12/8/2024- 51.9% 12/15/2024- 53.3% 12/2/2024- 54.3% (grab 59.3%) 12/9/2024- 53.9 (grab 56.1%) 12/16/2024- 53.8% 12/3/2024-54.8 % From 12/15/2024- 12/19/2024 water deliveries were stopped to downstream users. However, from 12/1-12/9/2024 water was being delivered and grab samples were above 55% on the 12/2,12/9 and 12/16/2024. The probe was adjusted on 12/9/2024. We are still waiting for conformation from the State of our minimum UVT% requirement for the plant. On December 9th, we had a 10,000 gallons Recycle Water Effluent spill on Los Osos Valley rd and South Bay blvd. Spilled Recycle Water Effluent went into two different storm drains. We confirmed with our Storm water coordinator that the storm drains did not lead into a body of water. The water was followed to a storm water retention pond to evaporate/percolate. Violation None Report Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144751 09/03/2024 OEV Haloacetic Acids Daily Maximum limit is 60.0 ppth and reported value was 86.0 ppth. Violation None Report Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144750 09/03/2024 OEV Haloacetic Acids Daily Maximum limit is 60.0 ppth and reported value was 86.0 ppth. Violation None Report Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144749 09/03/2024 CAT2 Total Trihalomethanes (TTHM) Daily Maximum limit is 80.0 ppth and reported value was 143.0 ppth. Violation None Report Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144748 08/05/2024 CAT2 Total Trihalomethanes (TTHM) Daily Maximum limit is 80.0 ppth and reported value was 143.0 ppth. Violation None Report Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1144746 07/01/2024 CAT2 Total Trihalomethanes (TTHM) Daily Maximum limit is 80.0 ppth and reported value was 140.0 ppth. Violation None Report Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1119738 07/23/2023 OEV Total Coliform 1-Hour Average (Mean) limit is 240 CFU/100 mL and reported value was 2419.6 CFU/100 mL at EFF-001. Violation N eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1112914 12/26/2022 OEV Turbidity 1-Hour Average (Mean) limit is 2 NTU and reported value was 2.27 NTU at EFF-001. Violation N eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1112913 12/26/2022 OEV Turbidity 1-Hour Average (Mean) limit is 2 NTU and reported value was 2.27 NTU at EFF-001. Violation N eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1112773 12/26/2022 OEV Turbidity 1-Hour Average (Mean) limit is 2 NTU and reported value was 2.3 NTU at EFF-001. Violation N eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1112772 12/26/2022 OEV Turbidity 24-hour Average limit is 2 NTU and reported value was 0 NTU at EFF-001. Violation N eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1112771 01/26/2023 OEV Turbidity 1-Hour Average (Mean) limit is 2 NTU and reported value was 02.27 NTU at EFF-001. Violation N eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 N
1108768 09/06/2022 Deficient Reporting Missed Influent BOD and TSS monitoring in September 2022. Violation N eSMR Los Osos Water Recycling Facility 379559 R3-2011-0001 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: 24
*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
300828 13267 Letter 03-0007 13267 for Los Osos CSD WDRMUNIOTH 02/07/2003 Historical
299194 Notice of Violation None NOV for Los Osos WTP WDR 01/11/2006 Historical
299193 13267 Letter None 13267 letter for Los Osos WTP WDRMUNIOTH 10/04/2005 Historical
297103 Admin Civil Liability R3-2005-0137 ACL R3-2005-0137 for LOS OSOS WTP WDR 01/05/2006 Active
Total Enforcement Actions: 4
  
  
  
  
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: 11/25/2025
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
Back to Main Page  |  Back to Top of Page

Conditions of Use | Privacy Policy
Copyright © 2024 State of California

The Board is one of six boards, departments, and offices under
the umbrella of the California Environmental Protection Agency.
Cal/EPA | ARB | DPR | DTSC | OEHHA | SWRCB