Alameda County, California Water Systems

Alameda County, California

20 community water systems on record — 14 active, 6 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.

Community water systems in Alameda County, California

System name	City	Population served	Status
ALAMEDA COUNTY WATER DISTRICT	FREMONT	344,000	Active
ALAMEDA POINT	OAKLAND	1,400	Active
BARTLETT LANE WATER SYSTEM	HAYWARD	25	Inactive
BARTLETT LANE WATER SYSTEM	HAYWARD	25	Inactive
CALIFORNIA WATER SERVICE - LIVERMORE	SAN JOSE	60,414	Active
CASTLEWOOD COUNTRY CLUB	PLEASANTON	25	Inactive
CASTLEWOOD DOMESTIC WATER SYSTEM	PLEASANTON	524	Active
CECILIA COURT WATER SYSTEM	SAN LEANDRO	0	Inactive
CITY OF HAYWARD	HAYWARD	162,954	Active
CITY OF LIVERMORE	LIVERMORE	38,892	Active
CITY OF PLEASANTON	PLEASANTON	76,689	Active
DONNA PIRRO	PLEASANTON	100	Inactive
DUBLIN SAN RAMON SERVICES DISTRICT	PLEASANTON	98,776	Active
EAST BAY MUD	OAKLAND	1,442,800	Active
MOHRLAND MUTUAL WATER SYSTEM	MT EDEN	116	Inactive
NORRIS CANYON PROPERTY OWNERS ASSN	CASTRO VALLEY	50	Active
SFPUC-PLEASANTON WELLS	BURLINGAME	1	Active
TOWN OF SUNOL - SFPUC	BURLINGAME	281	Active
TRAILER HAVEN MOBILE HOME PARK	SACRAMENTO	459	Active
ZONE 7 WATER AGENCY	LIVERMORE	40	Active