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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
19754 Jacob & Dorothy Hamstra Trust Privately-Individual N/A N/A N/A
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
642470 Hynes Dairy Tulare 5F Animal Feeding None None None
657366 Hamstra Dairy Complex Tulare 5F Animal Feeding Owner 06/29/2007 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
347813 Jacob Hamstra Person Owner Contact 10/17/2007 None None
347813 Jacob Hamstra Person Facility Contact 10/23/2006 None None
140457 Greg Hamstra Person Enforcement Contact 12/07/2001 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?
335670 Enrollee - WDR 5F 5D545043002 Active ANIWSTCOWS R5-2013-0122 06/29/2007 None Discharger 06/29/2007 None N
Total Regulatory Measures: 1
  
  
  
  
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
398392 Notice of Violation None NOV 10/06/2014 for Jacob & Dorothy Hamstra Trust ANIWSTCOWS 10/06/2014 Historical
373239 Notice of Violation None NOV of 07/28/2010 for Jacob & Greg Hamstra - Hamstra Dairy Complex ANIWSTCOWS 07/28/2010 Historical
256444 Notice of Violation UNKNOWN Enforcement - 5D545043002 ANIWSTCOWS 02/04/2005 Historical
240303 Staff Enforcement Letter UNKNOWN Enforcement - 5D545043002 ANIWSTCOWS 12/07/2001 Historical
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: 05/13/2026
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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