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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
538979 Bhavani Yerrapotu 1444 Borregas Avenue Sunnyvale, CA 94088 408-730-7268(+) byerrapotu@valleywater.org(+)
  
  
  
  
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
39930 Santa Clara Valley Water District (Valley Water) Organization Legally Responsible Official 08/08/2024 None Special District
42506 Sunnyvale City Organization Legally Responsible Official 06/18/2012 03/04/2019 City 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 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.
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: 0
*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
461100 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 06/24/2025 Active
458440 Santa Clara Valley Water District (Valley Water) Enrollee - WDR CERFILLEXC 10/03/2024 Historical
458392 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 09/24/2024 Historical
457994 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 04/22/2025 Active
457135 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 04/25/2025 Active
454507 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 09/29/2023 Historical
452767 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 06/30/2023 Active
450775 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 02/06/2023 Historical
450758 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 02/06/2023 Historical
447910 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 06/24/2022 Active
446536 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 06/30/2022 Active
446248 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 05/04/2022 Historical
445824 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 04/08/2022 Active
444319 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 09/20/2021 Active
442787 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 12/08/2021 Historical
440005 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 09/11/2020 Active
437621 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 04/30/2020 Historical
436066 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 06/04/2020 Active
435082 Santa Clara Valley Water District (Valley Water) 401 Certification CERREST 10/02/2020 Active
434008 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 03/09/2020 Active
433503 Santa Clara Valley Water District (Valley Water) WDR WDRNONMUNIPRCS 05/18/2020 Active
433499 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 05/19/2020 Active
432897 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 07/29/2019 Historical
432671 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 07/15/2019 Historical
430950 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 06/11/2019 Historical
429539 Santa Clara Valley Water District (Valley Water) Enrollee - WDR CERFILLEXC 04/09/2020 Historical
429466 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 05/30/2019 Historical
428451 Santa Clara Valley Water District (Valley Water) 401 Certification CERREST 04/26/2019 Active
425219 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 11/21/2018 Historical
420206 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 09/27/2019 Active
419841 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 04/17/2018 Historical
418563 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 02/16/2018 Historical
416747 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 05/23/2018 Active
416503 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 09/27/2017 Historical
416502 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 09/27/2017 Historical
416006 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 03/21/2017 Historical
415012 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 09/01/2017 Historical
413198 Santa Clara Valley Water District (Valley Water) Enrollee - WDR CERFILLEXC 08/28/2017 Historical
412383 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 08/24/2017 Active
407813 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 08/10/2016 Historical
407606 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 07/28/2016 Historical
406632 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 07/27/2017 Active
406454 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 07/07/2016 Historical
406144 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 05/13/2016 Historical
404271 Santa Clara Valley Water District (Valley Water) Enrollee - NPDES NPDNONMUNIPRCS 12/04/2015 Active
403870 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 01/07/2016 Historical
403079 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 10/16/2015 Historical
402177 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 09/02/2015 Historical
401128 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 07/19/2016 Historical
397588 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 09/11/2014 Active
397558 Santa Clara Valley Water District (Valley Water) WDR WDRNONMUNIPRCS 04/09/2014 Historical
397496 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 10/10/2014 Historical
397344 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERDREDGE 06/18/2014 Historical
397342 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 06/18/2014 Historical
397339 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 06/17/2014 Historical
396673 Santa Clara Valley Water District (Valley Water) Enrollee - NPDES NPDNONMUNIPRCS 01/02/2014 Historical
396292 Santa Clara Valley Water District (Valley Water) Enrollee - NPDES NPDNONMUNIPRCS 05/29/2014 Historical
396064 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 02/28/2012 Historical
395763 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 05/08/2014 Historical
394931 Santa Clara Valley Water District (Valley Water) Enrollee NPDNONMUNIPRCS 08/26/2013 Historical
393476 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 12/08/2015 Active
391801 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 04/25/2013 Historical
391799 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 04/25/2013 Historical
391456 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 05/03/2013 Historical
387917 Santa Clara Valley Water District (Valley Water) Enrollee - WDR CERFILLEXC 05/03/2013 Active
380660 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 04/15/2014 Historical
380063 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC 09/16/2011 Historical
375429 Santa Clara Valley Water District (Valley Water) Enrollee - 401 Certification CERFILLEXC 06/30/2010 Historical
373575 Santa Clara Valley Water District (Valley Water) Enrollee NPDNONMUNIPRCS 03/30/2010 Historical
373573 Santa Clara Valley Water District (Valley Water) Enrollee NPDNONMUNIPRCS 03/30/2010 Historical
373572 Santa Clara Valley Water District (Valley Water) Enrollee NPDNONMUNIPRCS 04/20/2010 Historical
371903 Santa Clara Valley Water District (Valley Water) WDR UNREGS None Historical
186255 Santa Clara Valley Water District (Valley Water) Enrollee NPDNONMUNIPRCS 09/29/2004 Historical
186247 Santa Clara Valley Water District (Valley Water) Enrollee WDRNONMUNIPRCS 03/07/2003 Historical
186244 Santa Clara Valley Water District (Valley Water) Enrollee - NPDES NPDNONMUNIPRCS 01/02/2014 Active
185264 Santa Clara Valley Water District (Valley Water) Enrollee NPDNONMUNIPRCS 09/12/2003 Historical
183255 Santa Clara Valley Water District (Valley Water) Enrollee NPDNONMUNIPRCS 10/09/2003 Historical
183254 Santa Clara Valley Water District (Valley Water) Enrollee NPDNONMUNIPRCS 02/06/2003 Historical
183155 Santa Clara Valley Water District (Valley Water) Enrollee NPDNONMUNIPRCS 06/23/1993 Historical
172940 Santa Clara Valley Water District (Valley Water) WDR CERMIT 02/27/2002 Historical
170941 Santa Clara Valley Water District (Valley Water) 401 Certification CERFILLEXC None Historical
148634 Santa Clara Valley Water District (Valley Water) WDR WDR 07/18/2001 Historical
147995 Santa Clara Valley Water District (Valley Water) WDR CERMIT 03/21/2001 Active
147781 Santa Clara Valley Water District (Valley Water) WDR WDR 07/10/2000 Historical
143139 Santa Clara Valley Water District (Valley Water) WDR WDR 07/16/1997 Historical
142497 Santa Clara Valley Water District (Valley Water) WDR WDR 09/16/1998 Historical
132940 Santa Clara Valley Water District (Valley Water) WDR CERFILLEXC 09/18/2002 Historical
132790 Santa Clara Valley Water District (Valley Water) WDR CERFILLEXC 12/03/2003 Historical
132102 Santa Clara Valley Water District (Valley Water) WDR CERFILLEXC 03/22/2002 Historical
131555 Santa Clara Valley Water District (Valley Water) WDR CERFILLEXC 01/23/2002 Active
131138 Santa Clara Valley Water District (Valley Water) Waiver WDR 12/07/2001 Historical
Total Regulatory Measures linked to Related Parties: 91
  
  
The current report was generated with data as of: 10/24/2025
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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