California Water Systems

California public water system directory

This directory lists the public water system profiles currently available for California. It is not a complete statewide inventory, and it is not an address-level service lookup.

Compare Systems

3 available California system records

Compare the PWSID, linked community, source-water context, and report year currently available for each California record.

All systems are shown.

PWSIDSystemCitiesCountiesSource waterViolation records shownLatest CCR
CA3710020SAN DIEGO, CITY OFSan DiegoNot verifiedMostly imported surface water, primarily blended Colorado River and State Water Project supplies, with a smaller imported treated-water component from regional plantsNo violation records shown in available records2025
CA1010007CITY OF FRESNOFresnoNot verifiedGroundwater and surface waterNo violation records shown in available records2025
CA1910065LONG BEACH UTILITIES DEPARTMENTLong BeachNot verifiedLocal groundwater and purchased imported surface waterNo violation records shown in available records2025
PWSIDCA3710020
SystemSAN DIEGO, CITY OF
CitiesSan Diego
CountiesNot verified
Source waterMostly imported surface water, primarily blended Colorado River and State Water Project supplies, with a smaller imported treated-water component from regional plants
Violation records shownNo violation records shown in available records
Latest CCR2025
PWSIDCA1010007
SystemCITY OF FRESNO
CitiesFresno
CountiesNot verified
Source waterGroundwater and surface water
Violation records shownNo violation records shown in available records
Latest CCR2025
PWSIDCA1910065
SystemLONG BEACH UTILITIES DEPARTMENT
CitiesLong Beach
CountiesNot verified
Source waterLocal groundwater and purchased imported surface water
Violation records shownNo violation records shown in available records
Latest CCR2025

Profiles

Open a California public water system profile

Each of these 3 profiles keeps its source links, annual-report details, limitations, and summarized CCR entries together.

Last updated: State data

SAN DIEGO, CITY OF

PWSID CA3710020

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System-level profile for San Diego. Use it to review report-year context, source links, available violation records, contaminant relationships, and limitations.

System type
Community water system
Communities
San Diego
Counties
County not listed
Latest CCR
2025
Last updated: State data

CITY OF FRESNO

PWSID CA1010007

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System-level profile for Fresno. Use it to review report-year context, source links, available violation records, contaminant relationships, and limitations.

System type
Community water system
Communities
Fresno
Counties
County not listed
Latest CCR
2025
Last updated: State data

LONG BEACH UTILITIES DEPARTMENT

PWSID CA1910065

View system profile

System-level profile for Long Beach. Use it to review report-year context, source links, available violation records, contaminant relationships, and limitations.

System type
Community water system
Communities
Long Beach
Counties
County not listed
Latest CCR
2025