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Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDCA2310003
PWS NameUKIAH, CITY OF
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceSurface water
Primacy TypeState
Is Wholesaler?No
Population Served16607
County ServedMendocino

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
MRFollow-up Or Routine LCR Tap M/RLead and Copper RuleLead and Copper Rule9603002Open01-OCT-2022 - No
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)9603001Returned to Compliance01-FEB-199629-FEB-1996Yes
OtherNotification, PublicMiscellaneous Other Rules - 8600546Known01-MAY-198631-MAY-1986No
  • 1 - 3 of 3

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
96030039603001SOXState Compliance achieved08-MAR-1996StateENF_NO:02-03-96C-034; STATE COMPLIANCE ACHEIVED (OX)
  • 1 - 1 of 1

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
INTERTIE WITH WILLOW CWD73981YesConsecutive ConnectionGround waterPermanentActive
WELL 0966328YesWell Ground waterPermanentActive
WELL 04B66327YesWell Ground waterPermanentActive
WELL 08 - OAK MANOR53932YesWell Ground waterPermanentActive
WELL 07 - GOBBI ST34304YesWell Ground waterPermanentActive
WELL 0312311YesWell Ground waterPermanentActive
WELL 05CA2310003006YesWell Ground waterOtherInactive
WELL 02 - INACTIVE21861YesWell Ground waterOtherInactive
WELL 06 - INACTIVE21860YesWell Ground waterOtherInactive
WELL 01 - DESTROYED18768YesWell Ground waterOtherInactive
WELL 05 - INACTIVE12322YesWell Ground waterOtherInactive
WELL 04 - INACTIVE12321YesWell Ground waterOtherInactive
RANNEY COLLECTOR29124YesIntakeSurface waterPermanentActive
INTERTIE WITH MILLVIEW CWD73979YesConsecutive ConnectionSurface waterPermanentActive
DISTRIBUTION SYSTEM29123NoDistribution System/Zone - - Active
TREATMENT PLANT - RANNEY COLLECTOR1696NoTreatment Plant - - Active
TREATMENT PLANT - WELL 031697NoTreatment Plant - - Active
TREATMENT PLANT - WELL 0755130NoTreatment Plant - - Active
TREATMENT PLANT - WELL 0855131NoTreatment Plant - - Active
WTP - WELL 04B67702NoTreatment Plant - - Active
WTP - WELL 0967703NoTreatment Plant - - Active
TREATMENT PLANT - WELL 04- INACTIVE1698NoTreatment Plant - - Inactive
TREATMENT PLANT - WELL 051699NoTreatment Plant - - Inactive
TREATMENT PLANT - WELL 06 - INACTIVE6646NoTreatment Plant - - Inactive
  • 1 - 24 of 24

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
TREATMENT PLANT - RANNEY COLLECTOR1696Rapid MixParticulate removal
TREATMENT PLANT - RANNEY COLLECTOR1696Gaseous Chlorination, PostDisinfection
TREATMENT PLANT - RANNEY COLLECTOR1696Filtration, Rapid SandParticulate removal
TREATMENT PLANT - RANNEY COLLECTOR1696SedimentationParticulate removal
TREATMENT PLANT - RANNEY COLLECTOR1696FlocculationParticulate removal
TREATMENT PLANT - RANNEY COLLECTOR1696CoagulationParticulate removal
TREATMENT PLANT - RANNEY COLLECTOR1696pH AdjustmentCorrosion control
TREATMENT PLANT - WELL 031697Hypochlorination, PostDisinfection
TREATMENT PLANT - WELL 04- INACTIVE1698Hypochlorination, PostDisinfection
TREATMENT PLANT - WELL 051699Hypochlorination, PostDisinfection
TREATMENT PLANT - WELL 0755130Hypochlorination, PostDisinfection
TREATMENT PLANT - WELL 0855131Hypochlorination, PostDisinfection
WTP - WELL 04B67702Ozonation, PreDisinfection
WTP - WELL 0967703Hypochlorination, PreDisinfection
  • 1 - 14 of 14

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.