Santa Clara County, California Water Systems

Santa Clara County, California

144 community water systems on record — 74 active, 70 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 Santa Clara County, California

System name	City	Population served	Status
ABORN HEIGHTS WATER MUTUAL ASSOCIATION	SAN JOSE	45	Active
AGNEW STATE HOSPITAL - EAST	AGNEW	1,100	Inactive
AGNEW STATE HOSPITAL - WEST	AGNEW	1,100	Inactive
AGNEWS DEV. CENTER - EAST CAMPUS	San Jose	0	Inactive
AGNEWS DEV. CENTER - WEST CAMPUS	SAN JOSE	0	Inactive
AGNEWS DEVELOPMENTAL CENTER	SAN JOSE	1,903	Inactive
AL HANFORD	SAN JOSE	300	Inactive
ALAMO FARMS MUTUAL WATER CO	GILROY	30	Inactive
ALDERCROFT HEIGHTS COUNTY WATER DISTRICT	LOS GATOS	338	Active
ALMA COLLEGE PROPERTIES	LOS GATOS	0	Inactive
ALMA WATER SYSTEM	LOS GATOS	50	Inactive
ALMADEN RANCH ESTATES	SAN JOSE	25	Inactive
ANGELO LANE WATER COMPANY	GILROY	41	Active
ARROWHEAD COOPERATIVE COMPANY	SARATOGA	109	Inactive
BRUSH AND OLD WELL MUTUAL WATER COMPANY	LOS GATOS	70	Active
BURCHELL ROAD WATER ASSOCIATION	GILROY	65	Active
CAL AM - WEST SAN MARTIN	PACIFIC GROVE	1,173	Active
CALIFORNIA WTR SERV CO	SAN JOSE	5,400	Inactive
CAMP SARATOGA	SARATOGA	450	Active
CAMPBELL WATER COMPANY	CAMPBELL	20,000	Inactive
CANDY RANCH MUTUAL WATER	SAN MARTIN	50	Inactive
CARIBBEES MOBILEHOME PARK	SAN JOSE	300	Inactive
CASA DE FRUTA WATER SYSTEM	HOLLISTER	250	Active
CHABOYA HILLS ESTATES	MORGAN HILL	25	Inactive
CHEMEKETA PARK MUTUAL WATER COMPANY	SANTA CLARA	346	Active
CHIALA WATER SYSTEM	MORGAN HILL	35	Inactive
CHIRI RANCH ESTATES MWC - INACTIVE	Morgan Hill	0	Inactive
CHIRI SWEET WATER COMPANY	SAN MARTIN	40	Active
CITY OF CUPERTINO	SAN JOSE	16,336	Active
CITY OF GILROY	GILROY	59,203	Active
CITY OF MILPITAS	MILPITAS	81,773	Active
CITY OF MORGAN HILL	MORGANN HILL	47,374	Active
CITY OF MOUNTAIN VIEW	MOUNTAIN VIEW	81,501	Active
CITY OF PALO ALTO	PALO ALTO	67,231	Active
CITY OF SAN JOSE - EVG/EDV/COY	SAN JOSE	101,265	Active
CITY OF SAN JOSE - NSJ/ALVISO	SAN JOSE	45,559	Active
CITY OF SANTA CLARA	SANTA CLARA	130,746	Active
CITY OF SUNNYVALE	SUNNYVALE	157,566	Active
COUNTY FAIR MOBILE HOME ESTATES	SAN JOSE	0	Inactive
COYOTE VALLEY RV RESORT	LOS GATOS	500	Active
CROWNER WATER SYSTEM ATTN	SAN JOSE	120	Inactive
CWSC LOS ALTOS SUBURBAN	SAN JOSE	69,973	Active
DEEP HOLE WATER ASSOC	GILROY	50	Inactive
DEER HILL MUTUAL WATER CO	MORGAN HILL	36	Active
EMERALD VALLEY MUTUAL	APTOS	25	Inactive
EMERALD VALLEY MUTUAL WATER COMPANY	GILROY	43	Active
ESTATES OF PARADISE VALLEY	MORGAN HILL	26	Inactive
FARMERS LABOR EXCHANGE	GILROY	150	Inactive
FOOTHILL MUTUAL WATER COMPANY	MORGAN HILL	36	Active
GLORIA ANSEN	CUPERTINO	86	Inactive
GOLDEN HEIGHTS MUTUAL WATER COMPANY	GILROY	66	Active
GRAYSTONE HEIGHTS CO OP INC	SAN JOSE	44	Inactive
GRAYSTONE WATER COMPANY	SAN JOSE	48	Inactive
GREAT OAKS WC INC	SAN JOSE	110,088	Active
GREEN ACRES MUTUAL WATER	MORGAN HILL	53	Active
GREEN MOUNTAIN WATER COMPANY	MORGAN HILL	80	Active
HAPPY ACRES MWC	GILROY	220	Active
J B MARTINI	GILROY	70	Inactive
JEAN ELLEN MUTUAL WATER CO	MORGAN HILL	27	Inactive
KENNON WATER COMPANY	SAN JOSE	142	Active
KINGS RIVER TRAILER PARK	SANGER, CA, 93657	43	Inactive
KLEIN HOMES WATER COMPANY	UKIAH	120	Inactive
LAKE CANYON MUTUAL WATER COMPANY	LOS GATOS	156	Active
LEE'S ORCHARD OWNERS ASSOCIATION	SARATOSA	35	Active
LEON SPROCK	LOS GATOS	40	Inactive
LICK OBSERVATORY-UCSC	MOUNT HAMILTON	284	Active
LILAC LANE WATER COMPANY	MORGAN HILL	42	Inactive
LIVE OAK CREEK MUTUAL WATER COMPANY	GILROY	30	Active
LOS RANCHOS DE UVAS WATER COMPANY	GILROY	58	Active
LOS SERENOS ROBLES01	LOS GATOS	26	Inactive
LUIS SCATTINI & SONS	SAN JOSE	12	Inactive
LUPIN LODGE	LOS GATOS	300	Active
MAGIC SANDS	SAN JOSE	600	Inactive
MARIA LANE MUTUAL WATER COMPANY	SARATOGA	42	Active
MAYBURY ROAD IMPROVEMENT ASSOC	SAN JOSE	100	Inactive
MC WILLIAMS MOBILE HOME PARK	—	27	Inactive
MECCHI WATER COMPANY	LODI	104	Active
MELODY WOODS WATER COMPANY	LOS GATOS	168	Active
MIREVAL IMPROVEMENT ASSOCIATION	LOS GATOS	60	Active
MONTEZUMA HILLS	LOS GATOS	90	Inactive
MOUNTAIN SPRINGS MUTUAL WATER COMPANY	LOS GATOS	40	Active
MT SPRINGS MUTUAL WATER COMPAN	LOS GATOS	45	Inactive
MT. EDEN MUTUAL WATER COMPANY	SARATOGA	165	Active
MT. PLEASANT WATER USERS ASSOCIATION	SAN JOSE	300	Active
NASA AMES RESEARCH CENTER	MOFFETT FIELD	16,273	Active
NEW AVENUE MUTUAL WATER COMPANY	GILROY	305	Active
O'NEILL WATER SYSTEM	SAN FRANCISCO	175	Inactive
OAK DELL PARK	SARATOGA	104	Active
OAKMONT WATER SYSTEM	STOCKTON	61	Active
OAKRIDGE WATER COMPANY	SAN JOSE	270	Inactive
PARKWAY LAKES RV PARK	SACRAMENTO	250	Active
PIONEER TRAILER PARK	93662	17	Inactive
PROPERTY MANAGEMENT DIVISION	SAN JOSE	150	Inactive
PURISSIMA HILLS WATER DISTRICT	LOS ALTOS HILLS	6,245	Active
QUAIL CREEK ESTATES MUTUAL WATER COMPANY	GILROY	55	Active
RAINERI MUTUAL WATER COMPANY	LOS GATOS	145	Active
RANCHO DE LOMAS MUTUAL WATER COMPANY	MORGAN HILL	35	Active
RANCHO ROBLES MUTUAL WATER COMPANY	SAN MARTIN	103	Active
RANCHO SANTA TERESA	SAN JOSE	800	Inactive
RANCHO SANTA TERESA MOBILE HOME PARK	SAN JOSE	0	Inactive
RANCHO VISTA WATER	GILROY	31	Inactive
REDWOOD MUTUAL WATER COMPANY	Redwood Estates	0	Inactive
REGLIN MUTUAL WATER COMPANY	CUPERTINO	0	Inactive
ROCKWOOD ESTATES MUTUAL WATER COMPANY	MORGAN HILL	30	Active
ROLLINGS HILLS MUTUAL WATER CO	CUPERTINO	30	Inactive
ROSEVIEW HEIGHTS MUTUAL WATER COMPANY	SAN JOSE	148	Active
RUCKER AVENUE MUTUAL WATER CO	GILROY	25	Active
RUSTIC TRAILER PARK	25	102	Inactive
SAN JOSE HIGHLANDS	SAN JOSE	400	Inactive
SAN JOSE STATE UNIVERSITY	SAN JOSE	34,861	Inactive
SAN JOSE WATER	SAN JOSE	1,039,920	Active
SAN MARTIN COUNTY WATER DISTRICT	SAN MARTIN	627	Active
SAN MARTIN FOOTHILLS WATER COMPANY	SAN MARTIN	145	Active
SANTA CLARA UNIVERSITY	SANTA CLARA	700	Inactive
SANTA CLARA VALLEY WATER DISTRICT	SAN JOSE	0	Active
SANTA TERESA MEADOWS WATER COMPANY	COYOTE	68	Active
SARATOGA HEIGHTS MUTUAL WATER COMPANY	SARATOGA	258	Active
SCHRAMM MUTUAL WATER CO	GILROY	16	Inactive
SHADY LANE MUTUAL WATER SYSTEM-INACTIVE	LOS GATOS	37	Inactive
SIERRA ROAD IMPROVEMENT ASSOCIATION INC	SAN JOSE	280	Inactive
SJS U DEPT PHYSICAL PLANT SUP	SAN JOSE	460	Inactive
SOUTH COUNTY RETIREMENT HOME	SAN MARTIN	46	Active
SOUTHSIDE MUTUAL WATER COMPANY	SAN JOSE	45	Inactive
SPRING AVENUE MUTUAL	MORGAN HILL	25	Inactive
SPRING VALLEY HEIGHTS ASSOCIATION INC	MILPITAS	66	Active
ST JOSEPH'S COLLEGE	MOUNTAIN VIEW	60	Inactive
STANFORD UNIVERSITY	STANFORD	35,853	Active
STEVE MORROW PRES	GILROY	66	Inactive
STONEBRIDGE MUTUAL WATER CO	MORGAN HILL	38	Active
SULLIVAN MUTUAL WATER	MORGAN HILL	53	Active
TERRY LYNN WATER SYSTEM	GILROY	40	Inactive
THOUSAND TRAILS - MORGAN HILL	TAMPA	413	Active
THREE SPRINGS RANCH MUTUAL WATER COMPANY	MT. HAMILTON	110	Active
TOWN & COUNTRY MOBILE VILLAGE	SAN JOSE	375	Inactive
TWIN CREEKS PROPERTIES - INACTIVE	LOS ALTOS	75	Inactive
TWIN VALLEY INC	CASTROVILLE	317	Active
USAF 6820 RADAR SQUADRON	ALMADEN AFS	25	Inactive
UVAS PINES RV PARK	MORGAN HILL	65	Active
VALLEY VIEW RANCHES	GILROY	45	Active
VALLEY VIEW RANCHES MUTUAL	PLEASANT HILL	40	Inactive
VELLADAO MOBILE HOME PARK	PETALUMA	75	Inactive
VISTA DEL LAGO	SAN JOSE	40	Inactive
VISTA GRANDE WATER USERS ASSOCIATION	LOS GATOS	79	Active
WHISPERING OAKS WATER COMPANY	SAN JOSE	40	Inactive