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Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDCA4110020
PWS NamePALO ALTO PARK MUTUAL WATER COMPANY
PWS TypeCommunity water system
Owner TypePrivate
Primary SourceGround water
Primacy TypeState
Is Wholesaler?No
Population Served2900
County ServedSan Mateo

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, Source Water (GWR)Ground Water RuleE. COLI917013Returned to Compliance14-JUN-2018 - No
MCLMaximum Contaminant Level Violation, Monthly (TCR)Total Coliform RuleColiform (TCR)917011Returned to Compliance01-JUL-201531-JUL-2015Yes
MRMonitoring, Repeat Minor (TCR)Total Coliform RuleColiform (TCR)117001Returned to Compliance01-JUL-200131-JUL-2001No
MRInitial Tap Sampling for Pb and CuLead and Copper RuleLead and Copper Rule94V0001Returned to Compliance30-JUN-199301-MAR-2000No
OtherNotification, PublicMiscellaneous Other Rules - 8700912Known01-AUG-198731-AUG-1987No
  • 1 - 5 of 5

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
917017917011SOXState Compliance achieved09-AUG-2021State -
917018917013SOXState Compliance achieved09-AUG-2021State -
917012117001SOXState Compliance achieved31-AUG-2001StateThis TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
00E000194V0001EOXFederal Compliance achieved01-MAR-2000ODSWeb -
  • 1 - 4 of 4

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
WELL 02 - INACTIVE15571YesWell Ground waterOtherInactive
WELL 0515596YesWell Ground waterPermanentActive
WELL 0615595YesWell Ground waterPermanentActive
WELL 0715588YesWell Ground waterPermanentActive
WELL 01 - DESTROYED18022YesWell Ground waterOtherInactive
WELL 03 - INACTIVE15597YesWell Ground waterOtherInactive
DISTRIBUTION SYSTEM31467NoDistribution System/Zone - - Active
LARGE TANK71564NoStorage - - Active
SMALL TANK71565NoStorage - - Active
WELL BLEND IRON/MANGANESE5933NoTreatment Plant - - Active
  • 1 - 10 of 10

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
WELL BLEND IRON/MANGANESE5933Hypochlorination, PreManganese removal
WELL BLEND IRON/MANGANESE5933Hypochlorination, PostDisinfection
WELL BLEND IRON/MANGANESE5933Hypochlorination, PreIron removal
  • 1 - 3 of 3

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.