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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
27662 Mammoth Mountain Ski Area LLC Privately-Owned Business Po Box 24 June Lake, CA 93529 760-934-2571(+) None
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
241097 Mobile Equipment Maintenance Mono 6B Facility Owner 08/11/1999 None
239291 Mammoth Mtn Ski Area WTF Mono 6B Wastewater Treatment Facility Owner 01/12/1984 None
239288 Mammoth Mountain Ski Area Mono 6B Outdoor Event Venue Owner 09/08/1983 None
234126 June Mtn Ski Area Chalet Mono 6B Wastewater Treatment Facility Owner 12/10/1981 None
234124 June Mountain Ski Area Mono 6B Outdoor Event Venue Operator 06/09/1983 None
Total Related Places: 5
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
549272 Mark Brownlie Person Employee 12/03/2014 None None
545458 Steve McCabe Person Employee 01/01/2013 None None
545457 Clifford Mann Person Employee 09/01/1973 None None
544590 Ron Cohen Person Legally Responsible Official 02/01/2004 None None
523428 Tom Hodges Person Data Submitter 07/02/2010 None None
386682 Rebecca Paranick Person Data Submitter 07/02/2007 09/16/2015 None
Total Related Parties: 6
  
  
  
  
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?
314407 Enrollee None 6B269908002 Historical NPDNONMUNIPRCS R6T-2003-0034 02/11/2005 07/24/2008 Discharger 11/02/2006 None N
204330 Enrollee 6V 6B269908002 Historical NPDNONMUNIPRCS 98-075 12/24/1999 11/06/2003 Discharger 09/01/2005 None N
147934 WDR 6V 6B268090001 Historical WDR 81-111 12/10/1981 None Discharger 12/10/1981 None N
147525 WDR 6V 6B261026001 Active WDRMUNIOTH 00-017 03/09/2000 None Discharger 03/09/2000 None N
147192 WDR 6V 6B261026001 Historical WDR 84-011 01/12/1984 03/09/2000 Discharger 01/12/1984 None N
147185 WDR 6V 6B268070001 Historical WDR 83-105 09/08/1983 03/12/1987 Discharger 09/08/1983 None N
147181 WDR 6V 6B261009001 Historical WDR 83-088 06/09/1983 None Discharger 06/09/1983 None N
146723 WDR 6V 6B268090001 Active WDRMUNIOWTS 99-035 09/09/1999 None Discharger 09/09/1999 None N
146552 WDR 6V 6B261009001 Active WDRNONMUNIPRCS 95-027 02/09/1995 None Discharger 02/09/1995 None N
146551 WDR 6V 6B268070001 Active WDRNONMUNIPRCS 95-026 02/09/1995 None Discharger 02/09/1995 None N
146376 WDR 6V 6B261009001 Historical WDR 87-035 03/12/1987 02/09/2005 Discharger 03/12/1987 None N
146124 WDR 6V 6B268070001 Historical WDR 87-034 03/12/1987 02/09/1995 Discharger 03/12/1987 None N
Total Regulatory Measures: 12
  
  
  
  
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.
1144650 10/24/2024 OEV pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.17 SU. Violation None Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141353 09/20/2023 OEV Dissolved Oxygen Instantaneous Minimum limit is 1.0 mg/L and reported value was 0.81 mg/L. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141352 07/27/2023 OEV Dissolved Oxygen Instantaneous Minimum limit is 1.0 mg/L and reported value was 0.93 mg/L. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141351 09/15/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.12 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141350 08/30/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 10.1 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141349 08/23/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.6 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141348 08/15/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.35 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141347 08/03/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.66 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141344 09/06/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.2 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141343 10/12/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.11 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141342 10/04/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.12 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141306 11/16/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.22 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141304 11/08/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.34 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141303 11/01/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.47 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141302 10/25/2023 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.25 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1141267 05/03/2024 Late Report This report was due 10/15/2023 but was not submitted until 5/3/2024 Violation N Report June Mtn Ski Area Chalet 146723 99-035 N
1141266 05/03/2024 Late Report This report was due 4/15/2023 but was not submitted until 5/3/2024 Violation N Report June Mtn Ski Area Chalet 146723 99-035 N
1141265 05/03/2024 Late Report This report was due 10/15/2022 but was not submitted until 5/3/2024 Violation N Report June Mtn Ski Area Chalet 146723 99-035 N
1141264 02/29/2024 Late Report This report was due 4/15/2022 but was not submitted until 2/29/2024 Violation N Report June Mtn Ski Area Chalet 146723 99-035 N
1113600 11/22/2022 OEV Dissolved Oxygen Instantaneous Minimum limit is 1.0 mg/L and reported value was 0.97 mg/L. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 Y
1113599 11/10/2022 OEV Dissolved Oxygen Instantaneous Minimum limit is 1.0 mg/L and reported value was 0.91 mg/L. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 Y
1113598 11/01/2022 OEV pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.18 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 Y
1113597 11/10/2022 OEV pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.19 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 Y
1113596 09/09/2022 OEV pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.56 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1113595 09/09/2022 OEV pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.24 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1113594 09/29/2022 OEV pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.08 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1108640 08/03/2022 Late Report Section II.F states, ¿Semi-annual monitoring reports including the preceding information shall be submitted to the Regional Board by the 15th day of the month following each semi-annual period.¿ This report was due 10/15/2021 but was not submitted until 8/3/2022, making this report 292 days late. Violation N Report June Mtn Ski Area Chalet 146723 99-035 Y
1107130 05/20/2021 OEV Dissolved Oxygen Instantaneous Minimum limit is 1.0 mg/L and reported value was 0.97 mg/L. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1107129 08/19/2021 OEV Dissolved Oxygen Instantaneous Minimum limit is 1.0 mg/L and reported value was 0.87 mg/L. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1107128 09/08/2021 OEV Dissolved Oxygen Instantaneous Minimum limit is 1.0 mg/L and reported value was 0.96 mg/L. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1107127 08/12/2021 OEV Dissolved Oxygen Instantaneous Minimum limit is 1.0 mg/L and reported value was 0.78 mg/L. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1107126 06/24/2021 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.61 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1107125 09/30/2021 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.18 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1107097 06/24/2021 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.75 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1107096 06/30/2021 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.1 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1107095 08/03/2022 Late Report Section II.B states, ¿By January 30, 2001 and each year thereafter, the Discharger shall submit an annual report summarizing the previous year¿s monitoring data using graphs and tables.¿ This Annual Report was due 1/30/2022 but was not submitted until 8/3/2022, making this report 185 days late. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1106967 02/15/2022 Deficient Reporting According to the WDRs, Pg. 12 Section I.B. states effluent reporting requirements. These requirements state, ¿Grab samples of the effluent discharged to the first pond from which percolation can occur, shall be collected and analyzed to determine the magnitude of the following parameters.¿ pH and Dissolved Oxygen must be recorded weekly according to the Board Order. The lab reports for Ponds A ¿ D, during the month of November, do not include the required pH and Dissolved Oxygen as required by the Board Order. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1106966 02/15/2022 Late Report According to the WDRs, Pg. 14 Section II.B. states submittal period requirements. These requirements state, ¿Quarterly Monitoring Reports containing the above-required information shall be submitted to the Regional Board by the 15th day following the end of each quarter.¿ This report was due on 1/15/2022 but not submitted until 2/15/2022. For the late report violation, monitoring report was submitted 31 days late from the due date to the submission date. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1106074 05/01/2022 Late Report According to the WDR, Pg. 14 Section II.B. states submittal period requirements. These requirements state, ¿Quarterly Monitoring Reports containing the above-required information shall be submitted to the Regional Board by the 15th day following the end of each quarter.¿ This report was due on 4/15/2022 but not submitted until 5/1/2022. monitoring report was submitted 16 days late from the due date to the submission date. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1106073 10/19/2021 OEV Dissolved Oxygen Instantaneous Minimum limit is 1.0 mg/L and reported value was 0.78 mg/L. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1106072 10/19/2021 OEV pH Single Sample Maximum limit is 9.0 SU and reported value was 9.75 SU. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 N
1106071 10/19/2021 Late Report According to the WDR, Pg. 14 Section II.B. states submittal period requirements. These requirements state, ¿Quarterly Monitoring Reports containing the above-required information shall be submitted to the Regional Board by the 15th day following the end of each quarter.¿ This report was due on 7/15/2021 but not submitted until 10/19/2021. Monitoring report was submitted 96 days late from the due date to the submission date. Violation N Report Mammoth Mtn Ski Area WTF 147525 00-017 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: 42
*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
452364 Waste Discharge Requirements None Waste Discharge Requirements 02/23/2023 for Mammoth Mountain Ski Area LLC WDRMUNIOTH 02/23/2023 Historical
450918 Notice to Comply None NTC 01/30/2023 for Mammoth Mountain Ski Area LLC WDRMUNIOWTS 01/30/2023 Active
440208 Oral Communication None Oral Com 05/07/2020 for Mammoth Mountain Ski Area LLC WDRMUNIENROTH 05/07/2020 Historical
416627 Notice of Violation None NOV 08/04/2017 for Mammoth Mountain Ski Area LLC WDRMUNIOTH 08/04/2017 Historical
408614 Oral Communication None Oral Com 08/29/2016 for Mammoth Mountain Ski Area LLC WDRMUNIOWTS 08/29/2016 Historical
404959 Oral Communication None Oral Com 02/23/2016 for Mammoth Mountain Ski Area LLC WDRMUNIOWTS 02/23/2016 Historical
403693 Oral Communication None Oral Com 10/26/2015 for Mammoth Mountain Ski Area LLC WDRNONMUNIPRCS 10/26/2015 Historical
403604 Oral Communication None Oral Com 10/26/2015 for Mammoth Mountain Ski Area LLC WDRNONMUNIPRCS 10/26/2015 Historical
388429 Staff Enforcement Letter None S.E.L. 12/4/2012 - 6B261009001 WDR 12/04/2012 Historical
388427 Staff Enforcement Letter None S.E.L. (12/4/2012) Enforcement - 6B268070001 WDR 12/04/2012 Historical
382831 Oral Communication None Oral Com 01/11/2012 for MAMMOTH MOUNTAIN SKI AREA WDR 01/11/2012 Historical
377323 Oral Communication None Oral Com 08/12/2010 for MAMMOTH MOUNTAIN SKI AREA WDR 08/12/2010 Historical
376723 Oral Communication None Oral-Mammoth Mtn Ski Area-June Mtn Ski Area Chalet (10-26-2010) WDR 10/26/2010 Historical
376510 Oral Communication UNKNOWN Oral Communication 6B261009001, 11/1/2010 WDR 06/09/1983 Historical
376363 Oral Communication None Enforcement - Oral 6B268090001 WDR 05/18/2004 Historical
252807 Staff Enforcement Letter UNKNOWN Enforcement - 6B268090001 WDR 05/18/2004 Historical
251519 Staff Enforcement Letter UNKNOWN Enforcement - 6B268070001 WDR 07/07/2004 Historical
251514 Staff Enforcement Letter UNKNOWN Enforcement - 6B261009001 WDR 07/07/2004 Historical
250547 Notice to Comply UNKNOWN Enforcement - 6B268070001 WDR 09/24/2003 Historical
248891 Staff Enforcement Letter UNKNOWN Enforcement - 6B268070001 WDR 08/16/2001 Historical
244557 Oral Communication UNKNOWN Enforcement - 6B261026001 WDR 12/10/2000 Historical
244481 Oral Communication UNKNOWN Enforcement - 6B261009001 WDR 11/03/2000 Historical
244480 Oral Communication UNKNOWN Enforcement - 6B268070001 WDR 11/03/2000 Historical
244478 Oral Communication UNKNOWN Enforcement - 6B261026001 WDR 12/05/2000 Historical
244281 Oral Communication UNKNOWN Enforcement - 6B268070001 WDR 05/15/2000 Historical
244280 Oral Communication UNKNOWN Enforcement - 6B261009001 WDR 05/15/2000 Historical
244279 Oral Communication UNKNOWN Enforcement - 6B268070001 WDR 07/15/2000 Historical
244234 Oral Communication UNKNOWN Enforcement - 6B268070001 WDR 02/24/2000 Historical
244233 Oral Communication UNKNOWN Enforcement - 6B261009001 WDR 02/24/2000 Historical
243990 Oral Communication UNKNOWN Enforcement - 6B261009001 WDR 07/15/2000 Historical
238982 Notice to Comply UNKNOWN Enforcement - 6B261009001 WDR 10/19/2001 Historical
Total Enforcement Actions: 31
  
  
  
  
Expand/Contract Enforcement Actions
Regulatory Measures linked to Related Parties
Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status
147525 Steve McCabe WDR WDRMUNIOTH 03/09/2000 Active
Total Regulatory Measures linked to Related Parties: 1
  
  
The current report was generated with data as of: 05/19/2026
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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