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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
554399 John Wiersma 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
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
28501 Merced Irrigation District Organization Legally Responsible Official 01/27/2016 None Special District
20151 Henry Miller Reclamation District 2131 Organization Legally Responsible Official 01/10/2019 None Privately-Owned Business
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 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.
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: 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
460403 Merced Irrigation District Enrollee - 401 Certification CERFILLEXC 04/17/2025 Active
459325 Merced Irrigation District 401 Certification CERFILLEXC 01/06/2025 Active
458296 Merced Irrigation District 401 Certification CERFILLEXC 10/30/2024 Active
454204 Merced Irrigation District Enrollee - 401 Certification CERFILLEXC 09/05/2023 Historical
453530 Merced Irrigation District Enrollee - 401 Certification CERREST 07/19/2023 Active
452391 Merced Irrigation District Enrollee - 401 Certification CERDREDGE 06/28/2022 Active
446735 Merced Irrigation District 401 Certification CERFILLEXC 03/29/2022 Historical
437080 Merced Irrigation District Enrollee - 401 Certification CERFILLEXC 03/25/2020 Historical
435146 Merced Irrigation District Enrollee - 401 Certification CERFILLEXC 11/04/2019 Historical
429524 Merced Irrigation District 401 Certification CERREST 07/12/2019 Historical
428236 Henry Miller Reclamation District 2131 Enrollee - 401 Certification CERFILLEXC 12/11/2018 Historical
404436 Merced Irrigation District Enrollee - 401 Certification CERFILLEXC 03/18/2016 Historical
397433 Merced Irrigation District 401 Certification CERFILLEXC 07/23/2014 Historical
393488 Merced Irrigation District Enrollee - WDR WDRMUNIENROTH 01/10/2014 Active
393487 Merced Irrigation District Enrollee - WDR WDRMUNIENROTH 01/10/2014 Active
393484 Merced Irrigation District Enrollee - WDR WDRMUNIENROTH 01/10/2014 Active
393483 Merced Irrigation District Enrollee - WDR WDRMUNIENROTH 01/10/2014 Active
383534 Merced Irrigation District 401 Certification CERFILLEXC 12/16/2011 Historical
363393 Merced Irrigation District Enrollee SSOMUNISML None Historical
316877 Merced Irrigation District Enrollee IRRI 07/01/2006 Historical
194759 Henry Miller Reclamation District 2131 Enrollee - NPDES NPDNONMUNIPRCS 03/07/2014 Active
194758 Merced Irrigation District Enrollee - NPDES NPDNONMUNIPRCS 02/10/2014 Active
144182 Merced Irrigation District WDR WDRMUNIOTH 06/28/1985 Historical
144181 Merced Irrigation District WDR WDRMUNIOTH 06/28/1985 Historical
144180 Merced Irrigation District WDR WDRMUNIOTH 06/28/1985 Historical
144179 Merced Irrigation District WDR WDRMUNILRG 06/28/1985 Historical
140607 Merced Irrigation District WDR WDRMUNIOTH 02/24/1989 Active
138884 Merced Irrigation District WDR WDRMUNIOTH 09/24/1970 Historical
Total Regulatory Measures linked to Related Parties: 28
  
  
The current report was generated with data as of: 10/31/2025
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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