Welcome to California
California Home
Welcome to California - images of Golden Gate Bridge, ocean sunset, waterfall, flowers, and city skyline California Home Welcome to the California Environmental Protection Agency
California Integrated Water Quality System Project (CIWQS)
   Party At-A-Glance Report

  
   [VIEW PRINTER FRIENDLY VERSION] [EXPORT THIS REPORT TO EXCEL]

  
  
  
  
  
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
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
631686 Atascadero Collection System San Luis Obispo 3 Collection_System Owner 04/06/2006 None
206653 Atascadero WWTP San Luis Obispo 3 Wastewater Treatment Facility Owner 02/01/2000 None
206648 Atascadero Aquatic Pesticides San Luis Obispo 3 Waterway/Shoreline Site Owner 02/13/2002 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
644371 Olivia Tahti Person Data Submitter 03/24/2024 None None
638987 Danielle Hakanson Person Data Submitter 04/13/2023 None None
560513 Ryan Hayes Person Legally Responsible Official 11/17/2016 None None
554909 Ryan Smith Person Data Submitter 03/02/2016 08/11/2022 None
554895 Landon Mortimer Person Data Submitter 03/01/2016 03/28/2017 None
554894 Tyler Lee Person Data Submitter 03/01/2016 01/06/2022 None
529230 David Athey Person Legally Responsible Official 09/26/2011 03/05/2015 None
448614 Geoffrey English Person Legally Responsible Official 11/29/2007 09/09/2011 None
401061 Barry Hardy Person Data Submitter 09/28/2007 None None
391640 Timothy Cleaver Person Legally Responsible Official 12/07/2021 None None
391640 Timothy Cleaver Person Data Submitter 08/01/2007 None None
391639 Justin Black Person Legally Responsible Official 08/01/2007 12/17/2021 None
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
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?
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
440272 Co-Permitee SB 3 400100001 Active SLIC 2020-0015-DWQ 07/09/2020 None Discharger 09/18/2020 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
185353 Enrollee 3 3 400206021 Historical NPDNONMUNIPRCS 2001-0012-DWQ 02/13/2002 01/31/2004 Discharger 09/01/2005 None N
143391 WDR 3 3 400100001 Historical WDRMUNILRG 88-084 07/08/1988 03/22/2001 Discharger 07/08/1990 None Y
143011 WDR 3 3 400100001 Historical WDRMUNILRG 81-060 06/12/1981 None Discharger 06/12/1981 None N
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 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.
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 90,677 and 3/27/2025 with 96,000 GPD. Violation None Report Atascadero WWTP 142083 01-014 N
1143429 03/31/2025 CAT1 Nitrogen, Total (as N) Monthly Median limit is 10 mg/L and reported value was 29.0 mg/L. 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 mg/L. 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/L. 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 was 950.0 mg/L. 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 was 216.0 mg/L. 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 is 30 mg/L and reported value was 59.3 mg/L. Violation None Report Atascadero WWTP 142083 01-014 N
1115604 04/20/2023 Sanitary Sewer Overflow/Spill/ Type: Category 1. Construction Diversion Failure;Bypass pump stopped pumping. caused 600.0 gallons of sewage to spill from Manhole;Bypass pump stopped pumping. at Golf course MH # GC1 to Drainage Channel. Surface water body affected (NA). Violation N SSO Atascadero Collection System 300071 2022-0103-DWQ N
1112157 01/09/2023 Sanitary Sewer Overflow/Spill/ Type: Category 1. Natural Disaster caused 400.0 gallons of sewage to spill from Manhole;NA at LS#13 to Drainage Channel;Separate Storm Drain;Street/Curb and Gutter;Surface Water. Surface water body affected (Salinas river.). Violation N SSO Atascadero Collection System 300071 2022-0103-DWQ N
1112109 01/09/2023 Sanitary Sewer Overflow/Spill/ Type: Category 1. Natural Disaster;Due to the high volume of storm runoff and highwater elevations in Atascadero creek and submerged manholes in surrounding areas the sewer was inundated with storm water. Estimated raw sewage lost was 25,000 gallons. caused 67500 gallons of sewage to spill from Manhole;Due to the high volume of storm runoff and highwater elevations in Atascadero creek and submerged manholes in surrounding areas the sewer was inundated with storm water. Estimated raw sewage lost was 25,000 gallons. at 41/101 to Surface Water;Atascadero creek.. Surface water body affected (Atascadero Creek). Violation N SSO Atascadero Collection System 300071 2022-0103-DWQ N
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: 11
*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
374004 Notice of Violation None NOV 04/19/2010 for Atascadero, City of SSOMUNILRG 04/19/2010 Historical
221697 Clean-up and Abatement Order 89-089 Enforcement - 3 400100001 WDRMUNILRG 03/14/1989 Historical
228013 Notice of Violation UNKNOWN Enforcement - 3 400100001 WDRMUNILRG 08/22/2000 Historical
373607 Oral Communication None Oral Com 01/21/2010 for Atascadero, City of SSOMUNILRG 01/21/2010 Historical
226798 Oral Communication UNKNOWN Enforcement - 3 400100001 WDRMUNILRG 10/29/1999 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
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: 10/17/2025
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
Back to Main Page  |  Back to Top of Page

Conditions of Use | Privacy Policy
Copyright © 2024 State of California

The Board is one of six boards, departments, and offices under
the umbrella of the California Environmental Protection Agency.
Cal/EPA | ARB | DPR | DTSC | OEHHA | SWRCB