Mariposa County, California Water Systems

Mariposa County, California

36 community water systems on record — 11 active, 25 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 Mariposa County, California

System name	City	Population served	Status
CDF & FP - MT. BULLION	MARIPOSA	60	Inactive
CEDAR LODGE	WATSONVILLE	656	Active
COULTERVILLE COUNTY SERVICE	MARIPOSA	300	Inactive
FISHCAMP MUTUAL WATER SYSTEM	FISHCAMP	210	Inactive
FISHCAMP MUTUAL WATER SYSTEM	FISH CAMP	210	Inactive
FRANK LEMELIN	MARIPOSA	500	Inactive
GOLDEN HILLS MOBILE HOME AND RV PARK	LA GRANGE	18	Inactive
GREENAMEYER BROTHERS WATER SY	MARIPOSA	500	Inactive
GREENAMYERS BROS WATER SYS	MARIPOSA	500	Inactive
LAKE MC CLURE BOAT CLUB MHP	SNELLING	200	Inactive
MARIPOSA COUNTY ROAD DEPT	MARIPOSA	100	Inactive
MARIPOSA MOBILE MANOR	COULTERVILLE	32	Inactive
MARIPOSA MOBILE MANOR	COULTERVILLE	32	Inactive
MARIPOSA PINES MUTUAL	MARIPOSA	284	Active
MARIPOSA PINES MUTUAL WATER CO	MARIPOSA	200	Inactive
MARIPOSA PINES MUTUAL WATER CO	MARIPOSA	80	Inactive
MARIPOSA PINES VILLA	MARIPOSA	28	Inactive
MARIPOSA PUBLIC UTILITY DIST	MARIPOSA	2,000	Active
MCCLURE BOAT CLUB, INC.	SNELLING	286	Active
MIDPINES TIMBER MOBILE HOME PARK	MIDPINES	30	Inactive
MPWD-COULTERVILLE CSA 1	MARIPOSA	193	Active
MT BULLION	MARIPOSA	104	Inactive
PONDEROSA BASIN MUTUAL WTR CO	MARIPOSA	798	Active
SIERRA GARDEN APARTMENTS	MARIPOSA	50	Inactive
SIERRA GARDEN APARTMENTS	MARIPOSA	0	Inactive
SIERRA MOBILE LODGE	GROVELAND	40	Inactive
TIMBER MOBILE HOME PARK	MIDPINES	25	Inactive
TIMBER MOBILE HOME PARK	MIDPINES	25	Inactive
YOSEMITE ALPINE VILLAGE	FISH CAMP	110	Inactive
YOSEMITE ALPINE VILLAGE	FISHCAMP	110	Inactive
YOSEMITE NPS-EL PORTAL	YOSEMITE NP	635	Active
YOSEMITE NPS-WAWONA	YOSEMITE NP	150	Active
YOSEMITE NPS-YOSEMITE VALLEY	YOSEMITE NP	1,000	Active
YOSEMITE TERRACE ESTATES	GREELEY HILL	130	Active
YOSEMITE WEST	WAWONA STATION	200	Inactive
YOSEMITE WEST WATER SYSTEM	MARIPOSA	420	Active