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AquaCensus

Public water system · CA4110008

Active

California Water Service - San Mateo

Community water system in San Mateo County, California, drawing primarily on purchased surface water.

Dataset updated . Source: EPA SDWIS/ECHO public records.

Population served

102,348

Service connections

25,440

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDCA4110008
System typeCommunity water system
Activity statusActive
Population served102,348
Service connections25,440
Primary water sourcePurchased surface water
Owner typePrivate
Primacy agencyCA state drinking water program
City served—
StateCalifornia
ZIP—
CountySan Mateo County →

Violations & enforcement

Violations data landing soon.

EPA SDWA violation and enforcement records for California Water Service - San Mateo are being ingested from EPA ECHO (updated quarterly) and will appear here. Until then, check EPA ECHO for current compliance history.

California Water Service - San Mateo: frequently asked questions

Is California Water Service - San Mateo's water safe to drink?

California Water Service - San Mateo is an active community water system regulated under the Safe Drinking Water Act, overseen by the CA state drinking water program. EPA SDWA violation and enforcement records for this system are being added to AquaCensus from EPA ECHO; consult EPA ECHO or your annual Consumer Confidence Report for its current compliance status.

Who runs California Water Service - San Mateo?

California Water Service - San Mateo (PWSID CA4110008) is a private-owned community water system, regulated by the CA state drinking water program.

How many people does California Water Service - San Mateo serve?

California Water Service - San Mateo reports serving 102,348 people through 25,440 service connections in San Mateo County, California.

Where does California Water Service - San Mateo get its water?

EPA SDWIS lists this system's primary water source as purchased surface water.

Other water systems in San Mateo County

Water systemCountyPopulation servedTypeSource
City of Daly CitySan Mateo104,901CommunityPurchased surface water
City of Redwood CitySan Mateo92,819CommunityPurchased surface water
California Water Service-S San FranciscoSan Mateo64,146CommunityPurchased surface water
California Water Service - Bear GulchSan Mateo61,431CommunitySurface water
City of San BrunoSan Mateo42,631CommunityPurchased surface water
North Coast County Water DistSan Mateo38,546CommunityPurchased surface water