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   Party At-A-Glance Report

  
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General Information
Party ID Party Name Party Classification Mailing Address Work Phone Email/Website
2331 Atascadero City City Agency 6500 Palma Avenue Atascadero, CA 93422 805-461-5000 None
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
206648 Atascadero Aquatic Pesticides San Luis Obispo 3 Waterway/Shoreline Site Owner 02/13/2002 None
631686 Atascadero Collection System San Luis Obispo 3 Collection_System Owner 04/06/2006 None
894546 Atascadero Creek Emergency Slope Stabilization San Luis Obispo 3 Dredge/Fill Site Owner 04/23/2024 None
829843 Atascadero Creek Pedestrian Bridge WDR San Luis Obispo 3 Dredge/Fill Site Owner 11/17/2016 None
726045 Atascadero Municipal SW San Luis Obispo 3 MS4 Owner 02/09/2012 None
206653 Atascadero WWTP San Luis Obispo 3 Wastewater Treatment Facility Owner 02/01/2000 None
Total Related Places: 6
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
74934 Mark Markwort Person Legally Responsible Official 04/06/2006 09/09/2011 None
74934 Mark Markwort Person Legal representative 06/17/2005 09/09/2011 None
391639 Justin Black Person Legally Responsible Official 08/01/2007 12/17/2021 None
391640 Timothy Cleaver Person Legally Responsible Official 12/07/2021 None None
391640 Timothy Cleaver Person Data Submitter 08/01/2007 None None
401061 Barry Hardy Person Data Submitter 09/28/2007 None None
448614 Geoffrey English Person Legally Responsible Official 11/29/2007 09/09/2011 None
529230 David Athey Person Legally Responsible Official 09/26/2011 03/05/2015 None
554894 Tyler Lee Person Data Submitter 03/01/2016 01/06/2022 None
554895 Landon Mortimer Person Data Submitter 03/01/2016 03/28/2017 None
554909 Ryan Smith Person Data Submitter 03/02/2016 08/11/2022 None
560513 Ryan Hayes Person Legally Responsible Official 11/17/2016 None None
638987 Danielle Hakanson Person Data Submitter 04/13/2023 None None
644371 Olivia Tahti Person Data Submitter 03/24/2024 None None
Total Related Parties: 14
  
  
  
  
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?
440272 Co-Permitee SB 3 400100001 Active SLIC 2020-0015-DWQ 07/09/2020 None Discharger 09/18/2020 None N
185353 Enrollee 3 3 400206021 Historical NPDNONMUNIPRCS 2001-0012-DWQ 02/13/2002 01/31/2004 Discharger 09/01/2005 None N
383100 Enrollee 3 3 40MS04027 Historical MNSTW2 2003-0005-DWQ 11/19/2009 06/30/2013 Discharger 02/09/2012 None N
300071 Enrollee 3 3SSO10222 Active SSOMUNILRG 2022-0103-DWQ 06/04/2007 None Discharger 04/10/2006 None N
453001 Enrollee - WDR 3 3 400100001 Active WDRMUNILRG R3-2020-0020 06/06/2023 None Discharger 06/12/2023 None N
442213 Resolution 3 3 400221860 Active WDRMUNIOWTS R3-2018-0007 12/07/2018 None Discharger 02/11/2021 None N
143011 WDR 3 3 400100001 Historical WDRMUNILRG 81-060 06/12/1981 None Discharger 06/12/1981 None N
143391 WDR 3 3 400100001 Historical WDRMUNILRG 88-084 07/08/1988 03/22/2001 Discharger 07/08/1990 None Y
142083 WDR 3 3 400100001 Historical WDRMUNILRG 01-014 03/23/2001 06/05/2023 Discharger 03/23/2001 None N
Total Regulatory Measures: 9
  
  
  
  
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.
1143429 03/31/2025 CAT1 Nitrogen, Total (as N) Monthly Median limit is 10 mg/L and reported value was 29 Violation None Report Atascadero WWTP 142083 01-014 N
1143433 03/31/2025 Surface Water Flow exceeded limit on 3/15/2025 with 97,000, 3/22/25 with 90,667, 3/23/2025 90, Violation None Report Atascadero WWTP 142083 01-014 N
1143417 03/31/2025 CAT1 Sulfate, Total (as S) Monthly Average (Mean) limit is 85 mg/L and reported value Violation None Report Atascadero WWTP 142083 01-014 N
1143412 03/31/2025 CAT1 Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average (Mean) limit Violation None Report Atascadero WWTP 142083 01-014 N
1143423 03/31/2025 CAT1 Sodium, Total Monthly Median limit is 65.0 mg/L and reported value was 136.0 mg/ Violation None Report Atascadero WWTP 142083 01-014 N
1143420 03/31/2025 CAT1 Chloride Monthly Median limit is 70 mg/L and reported value was 198 mg/L. Violation None Report Atascadero WWTP 142083 01-014 N
1143418 03/31/2025 CAT1 Total Dissolved Solids (TDS) Monthly Median limit is 550 mg/L and reported value Violation None Report Atascadero WWTP 142083 01-014 N
1143426 03/31/2025 CAT1 Sulfate, Total (as S) Monthly Median limit is 85 mg/L and reported value was 182 Violation None Report Atascadero WWTP 142083 01-014 N
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: 8
*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
221697 Clean-up and Abatement Order 89-089 Enforcement - 3 400100001 WDRMUNILRG 03/14/1989 Historical
304739 Oral Communication None Oral Communication with Atascadero WWTP WDRMUNILRG 06/07/2005 Historical
221447 Cease and Desist Order 92-068 Enforcement - 3 400100001 WDRMUNILRG 07/10/1992 Active
228013 Notice of Violation UNKNOWN Enforcement - 3 400100001 WDRMUNILRG 08/22/2000 Historical
226798 Oral Communication UNKNOWN Enforcement - 3 400100001 WDRMUNILRG 10/29/1999 Historical
373607 Oral Communication None Oral Com 01/21/2010 for Atascadero, City of SSOMUNILRG 01/21/2010 Historical
374004 Notice of Violation None NOV 04/19/2010 for Atascadero, City of SSOMUNILRG 04/19/2010 Historical
Total Enforcement Actions: 7
  
  
  
  
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: 10/21/2025
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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