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Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS IDCA4010009
PWS NameSAN LUIS OBISPO WATER DEPARTMENT
PWS TypeCommunity water system
Owner TypeLocal government
Primary SourceSurface water
Primacy TypeState
Is Wholesaler?No
Population Served47788
County ServedSan Luis Obispo

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 RuleTTHM1Returned to Compliance01-APR-201530-JUN-2015Yes
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Enforcement Actions


Enforcement Actions

Latest Enforcement IDAssociated To Violation IDEnforcement Action Type CodeEnforcement Action DescriptionEnforcement DateOriginator DescriptionEnforcement Comment
94060021SFLState Administrative/Compliance Order without penalty issued17-JUL-2015State04_06_15C_011_4010009_02
  • 1 - 1 of 1

PWS Facilities


All Facilities

Facility NameFacility IDIs SourceFacility Type DescriptionWater Type DescriptionAvailability DescriptionFacility Activity Status
NACIMIENTO WATER PROJECT31333YesConsecutive ConnectionSurface waterPermanentActive
RANGE WELL (1988) - INACTIVECA4010009008YesWell Ground waterOtherInactive
PACIFIC BEACH WELL 02 (1989) - INACTIVECA4010009007YesWell Ground waterOtherInactive
AUTO PARK WELL (1989) - ABANDONEDCA4010009001YesWell Ground waterOtherInactive
AUTO PARK WELL (1989) - DESTROYED8089YesWell Ground waterOtherInactive
FIRE STATION 04 WELL - STANDBY-INACTIVE24454YesWell Ground waterOtherInactive
MITCHELL PARK (1988) - INACTIVE21438YesWell Ground waterOtherInactive
CALLE JOAQUIN/DENNYS WELL - INACTIVE21437YesWell Ground waterOtherInactive
PACIFIC BEACH WELL 02 (1989) - DESTROYED21432YesWell Ground waterOtherInactive
RANGE WELL (1988) INACTIVE - IRRIGATION21404YesWell Ground waterOtherInactive
DALIDIO WELL (FARM WELL) - DESTROYED18824YesWell Ground waterOtherInactive
PACIFIC BEACH WELL - INACTIVE12093YesWell Ground waterOtherInactive
WHALE ROCK RESERVOIR RAW31335YesIntakeSurface waterPermanentActive
SANTA MARGARITA RESERVOIR RAW31334YesIntakeSurface waterPermanentActive
COMBINED TREATMENT PLANT - RAW31331YesIntakeSurface waterPermanentActive
DISTRIBUTION SYSTEM31332NoDistribution System/Zone - - Active
TREATMENT PLANT - TREATED156NoTreatment Plant - - Active
PACIFIC BEACH WELL - TRT CL139NoTreatment Plant - - Inactive
FIRE STATION 04 WELL - TRT CL - INACTIVE141NoTreatment Plant - - Inactive
MITCHELL PARK (1988)-TRT CL-INACT XCLD6431NoTreatment Plant - - Inactive
  • 1 - 20 of 20

PWS Treatment Processes


Treatment Processes

Facility NameFacility IDTreatment ProcessTreatment Objective
PACIFIC BEACH WELL - TRT CL139Hypochlorination, PreDisinfection
FIRE STATION 04 WELL - TRT CL - INACTIVE141Hypochlorination, PreDisinfection
TREATMENT PLANT - TREATED156Hypochlorination, PostDisinfection
TREATMENT PLANT - TREATED156Ozonation, PreDisinfection
TREATMENT PLANT - TREATED156SedimentationParticulate removal
TREATMENT PLANT - TREATED156Rapid MixParticulate removal
TREATMENT PLANT - TREATED156FlocculationParticulate removal
TREATMENT PLANT - TREATED156CoagulationParticulate removal
TREATMENT PLANT - TREATED156FilteredParticulate removal
  • 1 - 9 of 9

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.