U.S. flag

An official website of the United States government

Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDCA4910011
PWS NameSEBASTOPOL, CITY OF
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served7522
County ServedSonoma

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
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1018009Returned to Compliance01-OCT-200931-DEC-2009Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic918008Returned to Compliance01-JUL-200930-SEP-2009Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic918007Returned to Compliance01-APR-200930-JUN-2009Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic918006Returned to Compliance01-JAN-200931-MAR-2009Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic1018005Returned to Compliance01-OCT-200831-DEC-2008Yes
MCLMaximum Contaminant Level Violation, AverageArsenic RuleArsenic818004Returned to Compliance01-JUL-200830-SEP-2008Yes
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)818003Returned to Compliance01-MAY-200831-MAY-2008Yes
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)718002Returned to Compliance01-NOV-200630-NOV-2006Yes
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)3001Returned to Compliance01-NOV-199930-NOV-1999Yes
OtherNotification, PublicMiscellaneous Other Rules - 8900526Known01-AUG-198831-AUG-1988No
OtherNotification, PublicMiscellaneous Other Rules - 8900528Known01-JUL-198831-JUL-1988No
  • 1 - 11 of 11

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
1018007918006SOXState Compliance achieved31-DEC-2009StateRTC-SYSTEM INSTALLED TREATMENT
10180071018005SOXState Compliance achieved31-DEC-2009StateRTC-SYSTEM INSTALLED TREATMENT
1018007918008SOXState Compliance achieved31-DEC-2009StateRTC-SYSTEM INSTALLED TREATMENT
1018007818004SOXState Compliance achieved31-DEC-2009StateRTC-SYSTEM INSTALLED TREATMENT
10180071018009SOXState Compliance achieved31-DEC-2009StateRTC-SYSTEM INSTALLED TREATMENT
1018007918007SOXState Compliance achieved31-DEC-2009StateRTC-SYSTEM INSTALLED TREATMENT
1018009818003SOXState Compliance achieved30-JUN-2008StateThis TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
1018008718002SOXState Compliance achieved30-DEC-2006StateThis TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
180033001SOXState Compliance achieved10-DEC-1999StateENF_NO:02-03-99C-116; TOT COLIFORM MCL VIOLATION
  • 1 - 9 of 9

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
WELL 02 - INACTIVE20675YesWell Ground waterOtherInactive
WELL 0810946YesWell Ground waterPermanentActive
WELL 0410944YesWell Ground waterPermanentActive
WELL 0710920YesWell Ground waterPermanentActive
WELL 0610919YesWell Ground waterPermanentActive
WELL 05 - INACTIVE20721YesWell Ground waterOtherInactive
DISTRIBUTION SYSTEM33298NoDistribution System/Zone - - Active
TREATMENT PLANT - WELL 07 - BACKWASH58391NoOther - - Active
FIRST STREET71182NoStorage - - Active
PLEASANT HILL 171183NoStorage - - Active
PLEASANT HILL 271184NoStorage - - Active
TREATMENT PLANT - WELL 08 - TREATED5413NoTreatment Plant - - Active
TREATMENT PLANT - WELL 07 - TREATED5414NoTreatment Plant - - Active
TREATMENT PLANT - WELL 06 - TREATED5440NoTreatment Plant - - Active
TREATMENT PLANT - WELL 04 - TREATED5441NoTreatment Plant - - Active
TREATMENT PLANT - WELL 07 - POST PH, CL258281NoTreatment Plant - - Active
TREATMENT PLANT - WELL 07 - 25% VESSEL58282NoTreatment Plant - - Active
TREATMENT PLANT - WELL 07 - 50% VESSEL58283NoTreatment Plant - - Active
TREATMENT PLANT - WELL 07 - 75% VESSEL58284NoTreatment Plant - - Active
  • 1 - 19 of 19

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
TREATMENT PLANT - WELL 08 - TREATED5413Hypochlorination, PostDisinfection
TREATMENT PLANT - WELL 07 - TREATED5414Hypochlorination, PreDisinfection
TREATMENT PLANT - WELL 07 - TREATED5414pH Adjustment, PreInorganics removal
TREATMENT PLANT - WELL 07 - TREATED5414InnovativeInorganics removal
TREATMENT PLANT - WELL 06 - TREATED5440Hypochlorination, PreDisinfection
TREATMENT PLANT - WELL 06 - TREATED5440InnovativeInorganics removal
TREATMENT PLANT - WELL 06 - TREATED5440SedimentationParticulate removal
TREATMENT PLANT - WELL 04 - TREATED5441SedimentationParticulate removal
TREATMENT PLANT - WELL 04 - TREATED5441Activated Carbon, GranularOrganics removal
TREATMENT PLANT - WELL 04 - TREATED5441Hypochlorination, PostDisinfection
TREATMENT PLANT - WELL 07 - POST PH, CL258281Hypochlorination, PreDisinfection
TREATMENT PLANT - WELL 07 - 25% VESSEL58282InnovativeInorganics removal
TREATMENT PLANT - WELL 07 - 25% VESSEL58282Hypochlorination, PreDisinfection
TREATMENT PLANT - WELL 07 - 50% VESSEL58283InnovativeInorganics removal
TREATMENT PLANT - WELL 07 - 50% VESSEL58283Hypochlorination, PreDisinfection
TREATMENT PLANT - WELL 07 - 75% VESSEL58284InnovativeInorganics removal
TREATMENT PLANT - WELL 07 - 75% VESSEL58284Hypochlorination, PreDisinfection
  • 1 - 17 of 17

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.