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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
649419 David Liefert 650-772-3643 dliefert@openspace.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
52676 Mid Peninsula Regional Open Space District Organization Legally Responsible Official 02/27/2025 None Special District
Total Related Parties: 1
  
  
  
  
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
446680 Mid Peninsula Regional Open Space District Enrollee - WDR VEGMANIP 07/06/2021 Active
339225 Mid Peninsula Regional Open Space District Enrollee NPDNONMUNIPRCS 10/22/2004 Historical
445220 Mid Peninsula Regional Open Space District 401 Certification CERREST 02/09/2022 Active
391600 Mid Peninsula Regional Open Space District 401 Certification CERREST 05/22/2012 Historical
391354 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC 04/06/2012 Historical
400299 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC 06/26/2017 Active
410538 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC 02/07/2018 Historical
415957 Mid Peninsula Regional Open Space District Enrollee - 401 Certification CERFILLEXC 07/09/2018 Historical
420909 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC 07/29/2019 Historical
425494 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC 09/09/2019 Active
425507 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC 09/09/2019 Active
436587 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC 07/24/2020 Active
443843 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC 08/27/2021 Active
450637 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC 01/19/2023 Active
381241 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC 03/03/2010 Historical
374491 Mid Peninsula Regional Open Space District WDR CERFILLEXC 06/09/2010 Active
460093 Mid Peninsula Regional Open Space District Enrollee - 401 Certification CERFILLEXC 03/04/2025 Historical
167193 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC None Historical
167194 Mid Peninsula Regional Open Space District 401 Certification CERFILLEXC None Historical
Total Regulatory Measures linked to Related Parties: 19
  
  
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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