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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDMN1020044
PWS NameOak Grove
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served623
County ServedAnoka

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 Rule830156Returned to Compliance01-OCT-202531-DEC-2025No
MRMonitoring and Reporting (DBP)Stage 1 Disinfectants and Disinfection Byproducts RuleChlorine830157Known01-OCT-202531-DEC-2025No
MRFollow-up Or Routine LCR Tap M/RLead and Copper RuleLead and Copper Rule804717Returned to Compliance01-OCT-2024 - No
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic39252Returned to Compliance01-JUL-201029-JUL-2013Yes
  • 1 - 4 of 4

Enforcement Actions

Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
831095SOX830156SOXState Compliance achieved27-JAN-2026State -
830157SIE830157SIEState Public Notification requested21-JAN-2026State -
821903SOX804717SOXState Compliance achieved11-SEP-2025State -
53459939252SOXState Compliance achieved29-JUL-2013State -
  • 1 - 4 of 4

PWS Facilities

All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
Interconnect - St. Francis (Ponds System)8YesConsecutive ConnectionGround waterPermanentActive
Well #27YesWell Ground waterPermanentInactive
Well #217YesWell Ground waterPermanentActive
Well #15YesWell Ground waterEmergencyInactive
Well #116YesWell Ground waterEmergencyActive
Distribution System1NoDistribution System/Zone - - Active
TREATMENT PLANT #1 (Lake George)14NoTreatment Plant - - Active
Well #1 Entry Point4NoTreatment Plant - - Inactive
TREATMENT PLANT #16NoTreatment Plant - - Inactive
  • 1 - 9 of 9

PWS Treatment Processes

Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
TREATMENT PLANT #1 (Lake George)14Hypochlorination, PostDisinfection
TREATMENT PLANT #1 (Lake George)14FluoridationOther
TREATMENT PLANT #1 (Lake George)14PermanganateInorganics removal
TREATMENT PLANT #1 (Lake George)14Filtration, GreensandInorganics removal
TREATMENT PLANT #1 (Lake George)14Filtration, GreensandManganese removal
TREATMENT PLANT #1 (Lake George)14Filtration, GreensandIron removal
Well #1 Entry Point4Hypochlorination, PostDisinfection
Well #1 Entry Point4FluoridationOther
TREATMENT PLANT #16Hypochlorination, PostDisinfection
TREATMENT PLANT #16FluoridationOther
TREATMENT PLANT #16PermanganateInorganics removal
TREATMENT PLANT #16Filtration, GreensandInorganics removal
  • 1 - 12 of 12
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.