Sierra County, California Water Systems

Sierra County, California

10 community water systems on record — 8 active, 2 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 Sierra County, California

System name	City	Population served	Status
ALLEGHANY COUNTY W.D.	ALLEGHANY	82	Active
CITY OF LOYALTON	LOYALTON	983	Active
DOWNIEVILLE PUBLIC U.D.	DOWNIEVILLE	783	Active
MAPLE GROVE MUTUAL WATER CO.	SIERRA CITY	20	Inactive
SIERRA CITY WATER WORKS, INC.	GRASS VALLEY	250	Active
SIERRA CO. W.W.D #1 CALPINE	CALPINE	182	Active
SIERRA CSA #5, SIERRA BROOKS	DOWNIEVILLE	726	Active
SIERRA WATER RESOURCES - SIERRA CITY	CLAREMONT	324	Active
SIERRAVILLE P.U.D.	SIERRAVILLE	200	Active
SIMMONS WATER SYSTEM	ALLEGHANY	25	Inactive