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Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDCA2610001
PWS NameMAMMOTH CWD
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceSurface water
Primacy TypeState
Is Wholesaler?No
Population Served8234
County ServedMono

Note


The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

PWS Violation


Violations

Violation Category CodeViolation Type DescriptionRule NameContaminant NameViolation IDCompliance Status DescriptionCompliance Period Begin DateCompliance Period End DateIs Health Based Ind
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)9213004Returned to Compliance01-JAN-202331-DEC-2023No
MRMonitoring and Reporting (DBP)Stage 2 Disinfectants and Disinfection Byproducts RuleTTHM9213005Returned to Compliance01-JAN-202331-DEC-2023No
TTTreatment Technique (SWTR and GWR)Surface Water Treatment RuleSurface Water Treatment Rule9213002Returned to Compliance01-AUG-201631-AUG-2016Yes
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)9213001Returned to Compliance01-SEP-199230-SEP-1992Yes
TTTreatment Technique (SWTR and GWR)Surface Water Treatment RuleSurface Water Treatment Rule9113002Returned to Compliance01-JUN-199130-JUN-1991Yes
  • 1 - 5 of 5

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
99130239213005SFLState Administrative/Compliance Order without penalty issued25-JUL-2024State -
99130239213004SFLState Administrative/Compliance Order without penalty issued25-JUL-2024State -
99130229213001SOXState Compliance achieved06-APR-2018State -
99130209213002SFLState Administrative/Compliance Order without penalty issued31-OCT-2016State -
96130059113002SOXState Compliance achieved24-JAN-1995StateSYSTEM RETURNED TO COMPLIANCE
  • 1 - 5 of 5

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
LAKE MARY RAW WATER29305YesIntakeSurface waterPermanentActive
WELL 189653YesWell Ground waterPermanentActive
WELL 259650YesWell Ground waterPermanentActive
WELL 019649YesWell Ground waterPermanentActive
WELL 069648YesWell Ground waterPermanentActive
WELL 109647YesWell Ground waterPermanentActive
WELL 169645YesWell Ground waterPermanentActive
WELL 209643YesWell Ground waterPermanentActive
WELL 159638YesWell Ground waterPermanentActive
WELL 1723878YesWell Ground waterPermanentActive
HORIZONTAL WELL 01 - INACTIVE20009YesWell Ground waterOtherInactive
HORIZONTAL WELL 02 - INACTIVE20008YesWell Ground waterOtherInactive
WELL 07 - INACTIVE19998YesWell Ground waterOtherInactive
WELL 04 - DESTROYED17981YesWell Ground waterOtherInactive
WELL 3273904YesWell Ground waterOtherActive
DISTRIBUTION SYSTEM29304NoDistribution System/Zone - - Active
GWTP 2 EFFLUENT4194NoTreatment Plant - - Active
GWTP 1 EFFLUENT4196NoTreatment Plant - - Active
LAKE MARY TREATED WATER4217NoTreatment Plant - - Active
WELL 1 AERATOR EFFLUENT58367NoTreatment Plant - - Active
WELL 01 - TREATED (CL2) - INACTIVE45194NoTreatment Plant - - Inactive
WELL 25 - TREATED (CL2) - INACTIVE45195NoTreatment Plant - - Inactive
  • 1 - 22 of 22

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
GWTP 2 EFFLUENT4194Hypochlorination, PostDisinfection
GWTP 2 EFFLUENT4194Aeration, DiffusedCorrosion control
GWTP 2 EFFLUENT4194CoagulationInorganics removal
GWTP 2 EFFLUENT4194Filtration, Pressure SandInorganics removal
GWTP 1 EFFLUENT4196Hypochlorination, PostDisinfection
GWTP 1 EFFLUENT4196Aeration, DiffusedCorrosion control
GWTP 1 EFFLUENT4196CoagulationInorganics removal
GWTP 1 EFFLUENT4196Filtration, Pressure SandInorganics removal
LAKE MARY TREATED WATER4217pH Adjustment, PostCorrosion control
LAKE MARY TREATED WATER4217Hypochlorination, PostDisinfection
LAKE MARY TREATED WATER4217FilteredParticulate removal
WELL 01 - TREATED (CL2) - INACTIVE45194Hypochlorination, PostDisinfection
WELL 25 - TREATED (CL2) - INACTIVE45195Hypochlorination, PostDisinfection
WELL 1 AERATOR EFFLUENT58367Aeration, DiffusedCorrosion control
WELL 1 AERATOR EFFLUENT58367Hypochlorination, PostDisinfection
  • 1 - 15 of 15

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.