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Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDCA2800521
PWS NameCIRCLE OAKS WATER DISTRICT
PWS TypeCommunity water system
Owner TypePrivate
Primary SourceSurface water
Primacy TypeState
Is Wholesaler?No
Population Served500
County ServedNapa

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, RegularNitrate RuleNitrate700047Returned to Compliance01-JAN-202031-DEC-2020No
MRMonitoring, Routine Major (TCR)Total Coliform RuleColiform (TCR)700041Returned to Compliance01-DEC-200631-DEC-2006No
MRInitial Tap Sampling for Pb and CuLead and Copper RuleLead and Copper Rule95V0001Returned to Compliance01-JUL-1993 - No
MRMonitoring, RegularRadionuclides and Revised Rad RuleGross Alpha, Excl. Radon and U8233278Known01-OCT-198130-SEP-1982No
MRMonitoring, RegularRadionuclides and Revised Rad RuleGross Alpha, Excl. Radon and U8111211Known30-OCT-198029-OCT-1981No
  • 1 - 5 of 5

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
700051700047SOXState Compliance achieved09-MAR-2021State -
700046700041SIAState Violation/Reminder Notice06-FEB-2007State -
#1231073995V0001EOXFederal Compliance achieved30-JUN-2002ODSWebRTC of this violation was requested by CDPH (2007 EPA-CDPH LCR SNC cleanup initiative).
  • 1 - 3 of 3

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
COMBINED SURFACE SOURCES42500YesIntakeSurface waterPermanentActive
WELL 001-END OF DOGWOOD COURT36302YesWell Ground waterPermanentActive
WELL 002-NEAR 50000 GALLON TANK36300YesWell Ground waterOtherInactive
WELL #535912YesWell Ground water under the influence of surface waterOtherInactive
WELL #735899YesWell Ground water under the influence of surface waterOtherInactive
WELL #635890YesWell Ground water under the influence of surface waterOtherInactive
WELL 003-END OF COLUMBINE36329YesWell Ground waterEmergencyInactive
DISTRIBUTION SYSTEM42499NoDistribution System/Zone - - Active
TREATMENT PLANT55603NoTreatment Plant - - Active
  • 1 - 9 of 9

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
TREATMENT PLANT55603Hypochlorination, PreDisinfection
  • 1 - 1 of 1

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.