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California Integrated Water Quality System Project (CIWQS)
   Facility At-A-Glance Report

  
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Place ID 239283 		  
  
  
  
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General Information
Region Place ID Place Name Place Type Place Address Place County
6B 239283 Mammoth CWD STP Wastewater Treatment Facility 1315 Meridian Mammoth Lakes, CA, 93546 Mono
Expand/Contract Related Parties
Related Parties
Party Party Type Party Name Role Classification Relationship Start Date Relationship End Date
27659 Organization Mammoth Water District Owner County Agency 07/08/1982
Total Related Parties: 1
Expand/Contract Regulatory Measures
Regulatory Measures
Reg Measure ID Reg Measure Type Region Program Order No. WDID Effective Date Expiration Date Status Amended?
440319 Co-Permitee SB SLIC 2020-0015-DWQ 6B260103001 07/09/2020 Active N
145892 WDR 6V WDRMUNILRG 91-022 6B260103001 03/14/1991 03/14/2001 Active N
146085 WDR 6V WDRMUNILRG 86-047 6B260103001 04/10/1986 04/10/1989 Historical N
147943 WDR 6V WDRMUNILRG 82-078 07/08/1982 09/17/1984 Historical N
Total Reg Measures: 4
Expand/Contract Violations
Violations
Violation ID Occurred Date Violation Type (-) Violation Description Corrective Action Status Classification Source
1091263 06/18/2021 Order Conditions Effluent line actuator valve failed causing unauthorized discharge of .620 MG of treated tertiary effluent to on-site stormwater basin. Violates Board Order No. 6-91-22, I.D.2. Spill was stopped and discharger recommended installing a high float alarm in the chlorine contact basin that stops the pump from pumping to that basin. Violation B Report
1091644 09/30/2020 CAT1 Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average limit is 30.0 mg/L and reported value was 31.9 mg/L. Discharger did not propose or identify any corrective actions taken. Violation B Report
1091570 09/18/2020 CAT1 Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Daily Maximum limit is 45 mg/L and reported value was 76.3 mg/L. Discharger did not propose or identify any corrective actions taken. Violation B Report
1091569 09/09/2020 CAT1 Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Daily Maximum limit is 45 mg/L and reported value was 54.9 mg/L. Discharger did not propose or identify any corrective actions taken. Violation B Report
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
Total Violations: 4 Priority Violations: 0
*Click the "(+/-) Violation Description" link to expand and contract the violation description.
*As of 5/20/2010, the Water Board's Enforcement Policy requires that all violations be classified as 1, 2 or 3, with class 1 being the highest. Prior to this, violations were simply classified as Yes or No. If a 123 classification has been assigned to a violation that occurred before this date, that classification data will be displayed instead of the Yes/No data.
Violation Types
CAT1 = Category 1 Pollutant (Effluent Violation for Group 1 Pollutant) Order Conditions = Order Conditions
Expand/Contract Enforcement Actions
Enforcement Actions
Enf Id Enf Type Enf Order No. Effective Date Status
443941 Oral Communication null 06/24/2021 Historical
379171 Notice of Violation 91-022 05/12/2011 Historical
377114 Notice of Violation 12/22/2010 Historical
239504 Oral Communication 01/03/2002 Historical
237210 Notice to Comply 09/12/2001 Historical
375447 Notice to Comply 09/12/2001 Never Active
244470 Oral Communication 09/27/2000 Historical
243735 Oral Communication 02/11/2000 Historical
Total Enf Actions: 8
Expand/Contract Inspections
Inspections
Inspection ID Inspection Type Lead Inspector Actual End Date Planned Violations Attachment
44727928 B Type compliance inspection John Yu 07/30/2021 Y 0 Download
40957837 B Type compliance inspection Mark Lemus 07/09/2020 N 0 Download
36931869 B Type compliance inspection Woonhoe Kim 07/11/2019 N 0 Download
32561850 A Type compliance inspection John Morales 05/10/2018 N 0 N/A
33288948 B Type compliance inspection Thomas Edward Browne 08/03/2017 N 0 Download
22084933 A Type compliance inspection Thomas Edward Browne 10/15/2015 N 0 [Attachments]
18257487 B Type compliance inspection Francis Michael Coony 11/05/2014 N 0 Download
13398071 B Type compliance inspection Francis Michael Coony 08/08/2013 N 0 N/A
9431377 B Type compliance inspection Francis Michael Coony 08/21/2012 N 0 Download
6239893 B Type compliance inspection Francis Michael Coony 11/10/2011 N 0 Download
3178254 B Type compliance inspection Francis Michael Coony 10/27/2010 N 0 [Attachments]
3299584 Follow-up inspection (enforcement) Francis Michael Coony 10/27/2010 N 0 Download
1705813 B Type compliance inspection Francis Michael Coony 05/19/2009 N 0 Download
1419752 B Type compliance inspection Ghasem Pour-ghasemi 06/03/2008 N 0 Download
1091324 B Type compliance inspection Doug Feay 03/21/2007 N 0 N/A
335123 B Type compliance inspection Doug Feay 05/06/2004 Y 0 N/A
295121 B Type compliance inspection Joe Kenny 05/01/2002 Y 0 N/A
295120 B Type compliance inspection Joe Kenny 05/17/2001 Y 0 N/A
295118 A Type compliance inspection Jehiel Cass 09/16/1999 Y 0 N/A
295094 B Type compliance inspection Hisam Baqai 04/29/1999 Y 0 N/A
295119 B Type compliance inspection Jehiel Cass 02/06/1997 Y 0 N/A
295091 B Type compliance inspection Brad Nelson 05/29/1996 Y 0 N/A
295092 B Type compliance inspection Brad Nelson 05/26/1995 Y 0 N/A
295093 B Type compliance inspection Tom Rheiner 03/23/1994 Y 0 N/A
Total Inspections: 24 Last Inspection: 07/30/2021
  
The current report was generated with data as of: 05/21/2025
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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