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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
621030 San Francisco Public Utilities Commission City Agency 525 Golden Gate Avenue 6th Floor San Francisco, CA 94102 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
900678 O'Shaughnessy Dam Tuolumne 5F Waterway/Shoreline Site Owner and Operator 04/09/2025 None
871188 Southeast Water Pollution Control Plant Biosolids Digester Facilities Project San Francisco 2 Domestic Site NEC Owner and Operator 12/29/2020 None
Total Related Places: 2
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
621031 Ryan Cayabyab Person Legally Responsible Official 01/01/2021 None None
621031 Ryan Cayabyab Person Legally Responsible Official 12/29/2020 None None
558128 Maya McInerney Person Employee 04/09/2025 None None
Total Related Parties: 3
  
  
  
  
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?
441740 Enrollee - NPDES 2 2_38NPG441740 Historical NPDNONMUNIPRCS R2-2017-0048 01/01/2021 04/11/2024 Discharger 12/29/2020 None N
Total Regulatory Measures: 1
  
  
  
  
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.
1109463 06/30/2022 CAT2 Chromium (VI) Total Recoverable Monthly Average limit is 8.1 ug/L and reported value was 9.7 ug/L. Violation N Report Southeast Water Pollution Control Plant Biosolids Digester Facilities Project 441740 R2-2017-0048 Y
1105400 05/31/2022 CAT2 Chromium (VI) Total Recoverable Monthly Average limit is 8.1 ug/L and reported value was 8.3 ug/L. Violation N Report Southeast Water Pollution Control Plant Biosolids Digester Facilities Project 441740 R2-2017-0048 Y
1098250 10/31/2021 CAT2 Chromium (VI) Total Recoverable Monthly Average (Mean) limit is 8.1 ug/L and reported value was 29 ug/L. Violation N Report Southeast Water Pollution Control Plant Biosolids Digester Facilities Project 441740 R2-2017-0048 Y
1098249 10/15/2021 CAT2 Chromium (VI) Total Recoverable Maximum Daily (MDEL) limit is 16.0 ug/L and reported value was 33.0 ug/L. Violation None Report Southeast Water Pollution Control Plant Biosolids Digester Facilities Project 441740 R2-2017-0048 Y
1098247 10/07/2021 CAT2 Chromium (VI) Total Recoverable Maximum Daily (MDEL) limit is 16 ug/L and reported value was 25 ug/L. Violation N Report Southeast Water Pollution Control Plant Biosolids Digester Facilities Project 441740 R2-2017-0048 Y
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: 5
*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
455209 Admin Civil Liability R2-2024-1006 ACL R2-2024-1006 for San Francisco Public Utilities Commission NPDNONMUNIPRCS 03/05/2024 Historical
Total Enforcement Actions: 1
  
  
  
  
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: 11/03/2025
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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