Marin County, California Water Systems

Marin County, California

33 community water systems on record — 15 active, 18 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 Marin County, California

System name	City	Population served	Status
ANITA FERNANDEZ	TIBURON	45	Inactive
ARTOIS CSD	ARTOIS	150	Inactive
BLACK BUTTE MOBILE HOME PARK	WILLOWS	75	Inactive
BLUE MOUNTAIN CENTER	TOMALES	25	Inactive
BLUE MOUNTAIN CENTER	TOMALES	35	Active
BOLINAS COMMUNITY PUD	BOLINAS	2,483	Active
CHUCK HARRIS, SR	ORLAND	108	Inactive
COAST SPRINGS - CAL. WATER SERVICE (PUC)	SAN JOSE	388	Active
DONNIE R WALKER	ORLAND	49	Inactive
DUCK COVE WATER SYSTEM	—	12	Inactive
ELK CREEK COMMUNITY SERVICES D	ILK CREEK	450	Inactive
ESTERO MUTUAL	DILLON BEACH	206	Active
GREEN GULCH FARM	MUIR BEACH	75	Active
HERALD SMITH	HAMILTON CITY	29	Inactive
INVERNESS PUBLIC UTILITY DIST	INVERNESS	1,445	Active
JOHN MADERIOUS	INVERNESS	40	Inactive
JUNCO MOIBLE HOME PARK	ORLAND	165	Inactive
KANAWHA VILLAGE MHP	WILLOWS	125	Inactive
LAWSON S LANDING	DILLON BEACH	946	Active
LAWSONS LANDING	—	500	Inactive
MARCONI INCONFERENCE CENTER	MARSHALL	150	Inactive
MARIN MUNICIPAL WATER DISTRICT	CORTE MADERA	186,895	Active
MUIR BEACH COMMUNITY	MUIR BEACH	336	Active
NICASIO VALLEY RANCH MUTUAL	NICASIO	36	Active
NICASIO VALLEY RANCH MUTUAL WATER CO.	SANTA ROSA	25	Inactive
NORTH MARIN WATER DISTRICT	NOVATO	61,691	Active
NORTH MARIN WD - PT. REYES	NOVATO	1,841	Active
NPS GGNRA	SAUSALITO	18,447	Active
NPS PRNS - BEACHES	POINT REYES STATION	1,560	Active
NPS PRNS - FIVE BROOKS	POINT REYES	200	Inactive
STINSON BEACH COUNTY WTR DIST	STINSON BEACH	583	Active
SYNANON WALKER CREEK SETTLEMEN	MARSHALL	65	Inactive
WM G LOPACHUCK	HAYWARD	49	Inactive