Mono County, California Water Systems

Mono County, California

23 community water systems on record — 18 active, 5 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 Mono County, California

System name	City	Population served	Status
BIRCHIM COMMUNITY SERVICE DISTRICT	TOMS PLACE	150	Active
BRIDGEPORT PUD	BRIDGEPORT	524	Active
BRUCE CLARK WATER SYSTEM	MONTEREY PARK	200	Inactive
CHALFANT VALLEY WEST M.W.C.	BISHOP	45	Active
COLD WATER CANYON MWC	BISHOP	65	Active
CROWLEY LAKE MUTUAL WATER COMPANY	CROWLEY LAKE	175	Active
CROWLEY LAKE TRAILER PARK	CROWLEY LAKE	230	Active
DONALD MAES	JUNE LAKE	200	Inactive
JUNE LAKE PUD - DOWN CANYON	JUNE LAKE	2,810	Active
JUNE LAKE PUD VILLAGE	JUNE LAKE	2,763	Active
LEE VINING PUBLIC UTILITY DISTRICT	LEE VINING	672	Active
LOWER ROCK CREEK MUTUAL WATER CO.	BISHOP	310	Active
LUNDY MUTUAL WATER COMPANY	LEE VINING	70	Active
MAMMOTH CWD	MAMMOTH LAKES	8,234	Active
MARTIN'S TRAILER PARK 1	CHALFANT VALLEY	50	Inactive
MOUNTAIN MEADOWS MWC	MAMMOTH LAKES	505	Active
QUALITY TRAILER PARK	COLEVILLE	70	Inactive
SIERRA EAST HOA	COLEVILLE	84	Active
USMC - HOUSING COLEVILLE	BRIDGEPORT	424	Active
USMC/MTN WARFARE TRNG CTR - BRIDGEPORT	BRIDGEPORT	1,200	Active
WHEELER CREST CSD	BISHOP	86	Active
WHEELER CREST CSD	MAMMOTH LAKES	0	Inactive
WHITE MOUNTAIN MUTUAL WATER COMPANY	BISHOP	142	Active