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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDCA2410005
PWS NameCITY OF LOS BANOS
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served47419
County ServedMerced

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
RPTLSL ReportingLead and Copper Rule RevisionsLEAD AND COPPER RULE REVISIONS9311025Open17-OCT-2024 - No
TTLSL InventoryLead and Copper Rule RevisionsLEAD AND COPPER RULE REVISIONS9311024Open17-OCT-2024 - Yes
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)9311002Returned to Compliance01-AUG-201431-AUG-2014Yes
MRMonitoring, Repeat Minor (TCR)Total Coliform RuleColiform (TCR)211002Returned to Compliance01-JAN-200231-JAN-2002No
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)9311001Returned to Compliance01-NOV-199230-NOV-1992Yes
  • 1 - 5 of 5

Enforcement Actions

Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
99999000000000000019311024EFLFederal Final Administrative Order issued17-OCT-2025ODSWebSubmitted by Kaleb Lee - ADMINISTRATIVE ORDER Docket No. PWS-AO-2026-002
99999000000000000019311025EFLFederal Final Administrative Order issued17-OCT-2025ODSWebSubmitted by Kaleb Lee - ADMINISTRATIVE ORDER Docket No. PWS-AO-2026-002
93110039311002SOXState Compliance achieved01-DEC-2014StateTCR MCL
9311009211002SOXState Compliance achieved28-FEB-2002StateThis TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
93110109311001SOXState Compliance achieved30-DEC-1992StateThis TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
  • 1 - 5 of 5

PWS Facilities

All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
WELL 07-STBY14792YesWell Ground waterEmergencyActive
WELL 1524515YesWell Ground waterPermanentActive
WELL 14 - RAW14972YesWell Ground waterPermanentActive
WELL 13 - RAW14892YesWell Ground waterPermanentActive
WELL 0114797YesWell Ground waterPermanentActive
WELL 0214796YesWell Ground waterPermanentActive
WELL 0314795YesWell Ground waterPermanentActive
WELL 0514794YesWell Ground waterPermanentActive
WELL 0614793YesWell Ground waterPermanentActive
WELL 0914791YesWell Ground waterPermanentActive
WELL 1014790YesWell Ground waterPermanentActive
WELL 11 - RAW14789YesWell Ground waterPermanentActive
WELL 1214788YesWell Ground waterPermanentActive
WELL 08 - INACTIVECA2410005008YesWell Ground waterOtherInactive
WELL 08 - IRRIGATION ONLY22060YesWell Ground waterOtherInactive
WELL 04 - DESTROYED19605YesWell Ground waterOtherInactive
DISTRIBUTION SYSTEM29189NoDistribution System/Zone - - Active
WELL 06 - TRT CL & F3976NoTreatment Plant - - Active
WELL 01 - TRT CL & F3984NoTreatment Plant - - Active
WELL 02 - TRT CL & F3985NoTreatment Plant - - Active
WELL 05 - TRT CL & F3987NoTreatment Plant - - Active
WELL 07 - TRT CL & F -STBY3989NoTreatment Plant - - Active
WELL 09 - TRT CL & F3990NoTreatment Plant - - Active
WELL 10 - TRT CL & F3991NoTreatment Plant - - Active
WELL 11 - TRT CL & F3992NoTreatment Plant - - Active
WELL 13 - TRT CL & F3993NoTreatment Plant - - Active
WELL 14 - TRT CL & F3994NoTreatment Plant - - Active
WELL 12 - TRT CL & F3995NoTreatment Plant - - Active
WELL 03 - TRT CL & F3998NoTreatment Plant - - Active
WELL 15 - TRT CL & F7294NoTreatment Plant - - Active
WELL 08 - TREATED - INACTIVE6772NoTreatment Plant - - Inactive
  • 1 - 31 of 31

PWS Treatment Processes

Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
WELL 06 - TRT CL & F3976Hypochlorination, PostDisinfection
WELL 06 - TRT CL & F3976FluoridationOther
WELL 01 - TRT CL & F3984Hypochlorination, PostDisinfection
WELL 01 - TRT CL & F3984FluoridationOther
WELL 02 - TRT CL & F3985Hypochlorination, PostDisinfection
WELL 02 - TRT CL & F3985FluoridationOther
WELL 05 - TRT CL & F3987Hypochlorination, PostDisinfection
WELL 05 - TRT CL & F3987FluoridationOther
WELL 07 - TRT CL & F -STBY3989Hypochlorination, PostDisinfection
WELL 07 - TRT CL & F -STBY3989FluoridationOther
WELL 09 - TRT CL & F3990Hypochlorination, PostDisinfection
WELL 09 - TRT CL & F3990FluoridationOther
WELL 10 - TRT CL & F3991Hypochlorination, PostDisinfection
WELL 10 - TRT CL & F3991FluoridationOther
WELL 11 - TRT CL & F3992FluoridationOther
WELL 13 - TRT CL & F3993Hypochlorination, PostDisinfection
WELL 13 - TRT CL & F3993FluoridationOther
WELL 14 - TRT CL & F3994Hypochlorination, PostDisinfection
WELL 14 - TRT CL & F3994FluoridationOther
WELL 12 - TRT CL & F3995FluoridationOther
WELL 12 - TRT CL & F3995Hypochlorination, PostDisinfection
WELL 03 - TRT CL & F3998Hypochlorination, PostDisinfection
WELL 03 - TRT CL & F3998FluoridationOther
WELL 15 - TRT CL & F7294FluoridationOther
WELL 15 - TRT CL & F7294Hypochlorination, PostDisinfection
  • 1 - 25 of 25
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.