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PWS IDCA3910022
PWS NameLITTLE POTATO SLOUGH MUTUAL
PWS TypeCommunity water system
Owner TypePrivate
Primary SourceSurface water
Primacy TypeState
Is Wholesaler?No
Population Served1510
County ServedSan Joaquin

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, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTTHM510014Returned to Compliance01-OCT-202131-DEC-2021Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)510013Returned to Compliance01-JUL-201930-SEP-2019Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)510012Returned to Compliance01-APR-201930-JUN-2019Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)510010Returned to Compliance01-JAN-201931-MAR-2019Yes
MCLMaximum Contaminant Level Violation, AverageStage 2 Disinfectants and Disinfection Byproducts RuleTotal Haloacetic Acids (HAA5)510007Returned to Compliance01-APR-201630-JUN-2016Yes
OtherOperations ReportMiscellaneous Other Rules - 510005Returned to Compliance01-NOV-200431-DEC-2004No
MRFollow-up Or Routine LCR Tap M/RLead and Copper RuleLead and Copper Rule510006Returned to Compliance01-OCT-2004 - No
MRMonitoring, Repeat Minor (TCR)Total Coliform RuleColiform (TCR)310004Returned to Compliance01-AUG-200331-AUG-2003No
MRMonitoring of Treatment (SWTR-Filter)Surface Water Treatment RuleSurface Water Treatment Rule110003Returned to Compliance01-MAR-200131-MAR-2001No
MRMonitoring, Repeat Minor (TCR)Total Coliform RuleColiform (TCR)10002Returned to Compliance01-DEC-199931-DEC-1999No
MRMonitoring, RegularInorganic ChemicalsFluoride8907894Known01-JUN-198930-JUN-1989No
MRMonitoring, RegularNitrate RuleNitrate8907896Known01-JUN-198930-JUN-1989No
MRMonitoring, RegularInorganic ChemicalsSelenium8907898Known01-JUN-198930-JUN-1989No
MRMonitoring, RegularArsenic RuleArsenic8907892Known01-JUN-198930-JUN-1989No
OtherNotification, PublicMiscellaneous Other Rules - 8907897Known01-JUN-198930-JUN-1989No
MRMonitoring, RegularNitrate RuleNitrate8900465Known01-JUN-198830-JUN-1988No
MRMonitoring, RegularInorganic ChemicalsFluoride8900463Known01-JUN-198830-JUN-1988No
OtherNotification, PublicMiscellaneous Other Rules - 8900462Known01-JUN-198830-JUN-1988No
MRMonitoring, RegularInorganic ChemicalsSelenium8900467Known01-JUN-198830-JUN-1988No
MRMonitoring, RegularArsenic RuleArsenic8900461Known01-JUN-198830-JUN-1988No
  • 1 - 20 of 20

Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
9910013510014SOXState Compliance achieved29-JUN-2023StateThe LRAA for TTHM were below the MCL for 6 consecutive quarters.
9910011510013SOXState Compliance achieved03-NOV-2020StateReturned to compliance due to HAA5 LRAA < MCL for 4 consecutive quarters.
9910011510012SOXState Compliance achieved03-NOV-2020StateReturned to compliance due to HAA5 LRAA < MCL for 4 consecutive quarters.
9910011510010SOXState Compliance achieved03-NOV-2020StateReturned to compliance due to HAA5 LRAA < MCL for 4 consecutive quarters.
9910009110003SOXState Compliance achieved17-JUL-2019State -
9910010510005SOXState Compliance achieved17-JUL-2019State -
9910008510007SOXState Compliance achieved23-MAY-2019StatePWS remained in compliance through 7/1/2018 as required by the Compliance Order.
810018510006SOXState Compliance achieved11-FEB-2005StateENF_NO:03-10-05C-001; RETURNED TO COMPLIANCE. DIRECTIVES
410012310004SOXState Compliance achieved28-AUG-2003StateENF_NO:03-10-03C-006; DIRECTIVES
991000510002SOXState Compliance achieved31-JAN-2000StateThis TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
  • 1 - 10 of 10

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
LITTLE POTATO SLOUGH - RAW31283YesIntakeSurface waterPermanentActive
DISTRIBUTION SYSTEM31282NoDistribution System/Zone - - Active
LITTLE POTATO SLOUGH - TREATED2302NoTreatment Plant - - Active
  • 1 - 3 of 3

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
LITTLE POTATO SLOUGH - TREATED2302pH Adjustment, PostCorrosion control
LITTLE POTATO SLOUGH - TREATED2302Gaseous Chlorination, PostDisinfection
LITTLE POTATO SLOUGH - TREATED2302SedimentationParticulate removal
LITTLE POTATO SLOUGH - TREATED2302Rapid MixParticulate removal
LITTLE POTATO SLOUGH - TREATED2302CoagulationParticulate removal
LITTLE POTATO SLOUGH - TREATED2302Gaseous Chlorination, PreDisinfection
LITTLE POTATO SLOUGH - TREATED2302Filtration, Pressure SandParticulate removal
  • 1 - 7 of 7

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.