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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDAK2270338
PWS NameCHEFORNAK WATER SYSTEM
PWS TypeCommunity water system
Owner TypeTribal Government
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served513
County ServedBethel Census Area

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
MONMonitoring, Routine (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule6082934Known01-DEC-202531-DEC-2025No
OtherPublic Notification Violation without NPDWR ViolationPublic Notice Rule and Revised PN RulePublic Notice6082933Open15-OCT-2025 - No
MONMonitoring, Routine (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule6082931Returned to Compliance01-APR-202530-APR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsChlordane6082930Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsPentachlorophenol6082926Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsBenzo(a)pyrene6082925Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHEXACHLOROBENZENE6082924Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic Chemicals2,4,5-TP6082923Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic Chemicals2,4-D6082922Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsTotal Polychlorinated Biphenyls (PCB)6082927Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHeptachlor epoxide6082921Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHeptachlor6082920Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic Chemicals2,3,7,8-TCDD6082919Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsLASSO6082918Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsCarbofuran6082916Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsHexachlorocyclopentadiene6082915Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDinoseb6082914Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsPicloram6082913Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDi(2-ethylhexyl) phthalate6082912Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsSimazine6082911Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsOXAMYL6082910Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDi(2-ethylhexyl) adipate6082909Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsGlyphosate6082908Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsEndothall6082907Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDiquat6082906Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsDalapon6082905Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsToxaphene6082904Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsMethoxychlor6082903Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsBHC-GAMMA6082902Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsEndrin6082901Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic Chemicals1,2-DIBROMO-3-CHLOROPROPANE6082928Returned to Compliance01-JAN-202531-MAR-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsETHYLENE DIBROMIDE6082929Returned to Compliance01-JAN-202531-MAR-2025No
MONMonitoring, Routine (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule6082900Returned to Compliance01-JAN-202531-JAN-2025No
MRMonitoring, RegularSynthetic Organic ChemicalsAtrazine6082917Returned to Compliance01-JAN-202531-MAR-2025No
MONMonitoring, Routine (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule6082876Returned to Compliance01-DEC-202431-DEC-2024No
MONMonitoring, Routine (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule6082875Returned to Compliance01-NOV-202430-NOV-2024No
OtherConsumer Confidence Report Inadequate ReportingConsumer Confidence RuleConsumer Confidence Rule6082932Returned to Compliance01-OCT-2024 - No
MONMonitoring, Routine (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule6082874Returned to Compliance01-SEP-202430-SEP-2024No
MONMonitoring, Routine (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule6082873Returned to Compliance01-AUG-202431-AUG-2024No
TTFailure To Address DeficiencyGround Water RuleGroundwater Rule6082899Returned to Compliance01-JUN-2024 - Yes
MONMonitoring, Routine (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule6082872Returned to Compliance01-JUN-202430-JUN-2024No
MONMonitoring, Routine (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule6082870Returned to Compliance01-MAY-202431-MAY-2024No
MONMonitoring, Routine (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule6082871Returned to Compliance01-APR-202430-APR-2024No
MONMonitoring, Routine (RTCR)Revised Total Coliform RuleRevised Total Coliform Rule6082869Returned to Compliance01-FEB-202429-FEB-2024No
MRMonitoring, RegularVolatile Organic ChemicalsCarbon tetrachloride6082888Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicals1,1,1-Trichloroethane6082887Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicals1,2-Dichloroethane6082886Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicalstrans-1,2-Dichloroethylene6082885Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic Chemicals1,1-Dichloroethylene6082884Returned to Compliance01-JAN-202431-DEC-2024No
MRMonitoring, RegularVolatile Organic ChemicalsVinyl chloride6082883Returned to Compliance01-JAN-202431-DEC-2024No
  • 1 - 50 of 316

Enforcement Actions

Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
53473076082932SOXState Compliance achieved30-SEP-2025StateRTC monitoring violation for not certifying 2023 CCR in 2024. 2024 CCR was certified on time in 2025 - mea
53472996082931SOXState Compliance achieved12-MAY-2025StateRTC mon vio for missed TC sample in April 2025 - mea 6/5/25
53472946082916SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082917SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082918SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082919SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082920SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082921SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082922SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082923SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082924SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082925SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082926SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082927SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082928SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082929SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082930SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082901SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082902SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082903SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082904SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082905SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082906SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082907SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082908SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082909SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082910SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082911SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082912SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082913SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082914SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472946082915SOXState Compliance achieved22-APR-2025StateRTC monitoring violation for failure to submit SOC waiver/sample for SOCs in 1Q2025. System submitted waiver on 3/4/25 and paid on 4/17/25 - mea 4/22/25
53472896082876SOXState Compliance achieved26-FEB-2025StateRTC TC mon vios, Nov 24 - Jan 25 - mea 3/5/25
53472896082875SOXState Compliance achieved26-FEB-2025StateRTC TC mon vios, Nov 24 - Jan 25 - mea 3/5/25
53472896082900SOXState Compliance achieved26-FEB-2025StateRTC TC mon vios, Nov 24 - Jan 25 - mea 3/5/25
53473036082865SOXState Compliance achieved25-FEB-2025StateThe insulated box around the well head has a lid that closes with a gasket to the flange of the box. The deficiency was not reidentified in the 2025 sanitary survey and is considered to be resolved. -MHYDE
53473056082899SOXState Compliance achieved25-FEB-2025State09/17/2025 Regarding the SEAL deficiency: deficiency is considered to be resolved due to the gasket in place on the sheet metal box around the well. Issue was not identified in the 2025 sanitary survey. Marking resolved one day before the 2025 sanitary survey. -MHYDE
53472916082842SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082843SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082844SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082845SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082846SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082847SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082848SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082849SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082850SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082851SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082852SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082853SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
53472916082854SOXState Compliance achieved18-FEB-2025StateRTC mon vios for no VOC samples, 2020-2024 - mea 3/12/25
  • 1 - 50 of 277

PWS Facilities

All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
WELL32938YesWell Ground waterPermanentActive
DISTRIBUTION SYSTEM - CIRCULATING LOOP39358NoDistribution System/Zone - - Active
INACTIVE SAMPLE FACILITY- CANNOT REMOVE40254NoSampling Station - - Inactive
2 X 2.5K GAL STORAGE TANKS50574NoStorage - - Active
21.2K GAL STORAGE TANK50575NoStorage - - Active
4K GAL STORAGE TANK31422NoStorage - - Inactive
INACTIVE TP - NO TREATMENT FROM 201532185NoTreatment Plant - - Inactive
  • 1 - 7 of 7

PWS Treatment Processes

Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
INACTIVE TP - NO TREATMENT FROM 201532185Hypochlorination, PreDisinfection
INACTIVE TP - NO TREATMENT FROM 201532185Filtration, GreensandInorganics removal
  • 1 - 2 of 2
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.