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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDCO0101170
PWS NameWESTMINSTER CITY OF
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceSurface water
Primacy TypeState
Is Wholesaler?No
Population Served202078
County ServedAdams

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 of Treatment (SWTR-Filter)Surface Water Treatment RuleSurface Water Treatment Rule562Returned to Compliance01-JAN-202531-JAN-2025No
MRMonitoring of Treatment (SWTR-Filter)Surface Water Treatment RuleSurface Water Treatment Rule561Returned to Compliance01-DEC-202431-DEC-2024No
MRMonitoring of Treatment (SWTR-Filter)Surface Water Treatment RuleSurface Water Treatment Rule560Returned to Compliance01-JAN-202231-JAN-2022No
MRMonitoring, RegularVolatile Organic Chemicals1,1,1-Trichloroethane1390Returned to Compliance01-JAN-198831-DEC-1988No
MRMonitoring, RegularVolatile Organic ChemicalsCarbon tetrachloride990Returned to Compliance01-JAN-198831-DEC-1988No
MRMonitoring, RegularVolatile Organic ChemicalsTrichloroethylene1490Returned to Compliance01-JAN-198831-DEC-1988No
MRMonitoring, RegularVolatile Organic Chemicals1,2-Dichloroethane1190Returned to Compliance01-JAN-198831-DEC-1988No
MRMonitoring, RegularVolatile Organic ChemicalsBenzene890Returned to Compliance01-JAN-198831-DEC-1988No
MRMonitoring, RegularVolatile Organic Chemicalsp-Dichlorobenzene1090Returned to Compliance01-JAN-198831-DEC-1988No
MRMonitoring, RegularVolatile Organic Chemicals1,1-Dichloroethylene1290Returned to Compliance01-JAN-198831-DEC-1988No
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Enforcement Actions

Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
420561SIFState Public Notification received20-JUN-2025StatePN performed with 2025 CCR. MM 7/1/2025
420562SIFState Public Notification received20-JUN-2025StatePN performed with 2025 CCR. MM 7/1/2025
414560SOXState Compliance achieved02-MAR-2022State -
80027911290SOXState Compliance achieved24-MAY-1991StateWESTMINSTER VOC FTM - NOW IN COMPLIANCE
80027911390SOXState Compliance achieved24-MAY-1991StateWESTMINSTER VOC FTM - NOW IN COMPLIANCE
80027911490SOXState Compliance achieved24-MAY-1991StateWESTMINSTER VOC FTM - NOW IN COMPLIANCE
80027911190SOXState Compliance achieved24-MAY-1991StateWESTMINSTER VOC FTM - NOW IN COMPLIANCE
8002791990SOXState Compliance achieved24-MAY-1991StateWESTMINSTER VOC FTM - NOW IN COMPLIANCE
8002791890SOXState Compliance achieved24-MAY-1991StateWESTMINSTER VOC FTM - NOW IN COMPLIANCE
80027911090SOXState Compliance achieved24-MAY-1991StateWESTMINSTER VOC FTM - NOW IN COMPLIANCE
  • 1 - 10 of 10

PWS Facilities

All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
PURCHASED WATER FROM THORNTON18827YesConsecutive ConnectionSurface waterEmergencyActive
STANDLEY LAKE22YesIntakeSurface waterPermanentActive
FHL BYPASS22122YesIntakeSurface waterEmergencyActive
PURCHASED FROM CO010104024350YesConsecutive ConnectionSurface waterEmergencyActive
PURCHASED FROM CO010715524351YesConsecutive ConnectionSurface waterEmergencyActive
PURCHASED FROM CO011600124352YesConsecutive ConnectionSurface waterEmergencyActive
PURCHASED FROM CO010111524353YesConsecutive ConnectionSurface waterEmergencyActive
PURCHASED FROM CO013000124354YesConsecutive ConnectionSurface waterEmergencyActive
DISTRIBUTION SYSTEM6392NoDistribution System/Zone - - Active
COMBINED RAW SOURCE14066NoSampling Station - - Active
COMBINED RAW SOURCE14067NoSampling Station - - Active
COUNTRYSIDE CONCRETE TANK13459NoStorage - - Active
HYDROPILLAR ELEVATED STORAGE TANK13462NoStorage - - Active
WANDERING VIEW SOUTH TANK13463NoStorage - - Active
WANDERING VIEW NORTH TANK13464NoStorage - - Active
NORTHRIDGE TANK 3 EAST22077NoStorage - - Active
HIGH SERVICE PUMP STATION WETWELL22258NoStorage - - Active
NORTHRIDGE TANK 2 MIDDLE22410NoStorage - - Active
NORTHRIDGE TANK 1 WEST22411NoStorage - - Active
GREGORY HILL EAST TANK22917NoStorage - - Active
GREGORY HILL WEST TANK22918NoStorage - - Active
NEW SUNSET RIDGE ELEVATED STORAGE TANK23244NoStorage - - Active
SEMPER HSPS CLEARWELL25762NoStorage - - Active
NORTHWEST CLEARWELL25763NoStorage - - Active
GREGORY HILL EAST TANK HAMMOND TANK13460NoStorage - - Inactive
GREGORY HILL WEST TANK13461NoStorage - - Inactive
SUNSET RIDGE ELEVATED STORAGE TANK13465NoStorage - - Inactive
NORTHRIDGE WEST TANK HORTON TANK13466NoStorage - - Inactive
NORTHRIDGE MIDDLE TANK13467NoStorage - - Inactive
THORNTON WESTMINSTER INTER CONNECT13458NoTransmission Main (Manifold) - - Inactive
NORTHWEST WATER TREATMENT PLANT13457NoTreatment Plant - - Active
SEMPER WTP3298NoTreatment Plant - - Active
  • 1 - 32 of 32

PWS Treatment Processes

Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
NORTHWEST WATER TREATMENT PLANT13457PermanganateManganese removal
NORTHWEST WATER TREATMENT PLANT13457Activated Carbon, PowderedOrganics removal
NORTHWEST WATER TREATMENT PLANT13457InnovativeParticulate removal
NORTHWEST WATER TREATMENT PLANT13457CoagulationParticulate removal
NORTHWEST WATER TREATMENT PLANT13457FlocculationParticulate removal
NORTHWEST WATER TREATMENT PLANT13457SedimentationParticulate removal
NORTHWEST WATER TREATMENT PLANT13457InnovativeParticulate removal
NORTHWEST WATER TREATMENT PLANT13457Hypochlorination, PostDisinfection
NORTHWEST WATER TREATMENT PLANT13457InnovativeDisinfection
NORTHWEST WATER TREATMENT PLANT13457ChloraminesDisinfection
NORTHWEST WATER TREATMENT PLANT13457InnovativeCorrosion control
SEMPER WTP3298PermanganateManganese removal
SEMPER WTP3298Activated Carbon, PowderedOrganics removal
SEMPER WTP3298Rapid MixParticulate removal
SEMPER WTP3298CoagulationParticulate removal
SEMPER WTP3298SedimentationParticulate removal
SEMPER WTP3298Filtration, Rapid SandParticulate removal
SEMPER WTP3298Hypochlorination, PreDisinfection
SEMPER WTP3298InnovativeDisinfection
SEMPER WTP3298ChloraminesDisinfection
SEMPER WTP3298InnovativeCorrosion control
  • 1 - 21 of 21
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.