Big Horn County, Montana Water Systems

Big Horn County, Montana

12 community water systems on record — 5 active, 7 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 Montana’s official records. Always confirm current status with Montana before making decisions based on this information.

Community water systems in Big Horn County, Montana

System name	City	Population served	Status
BOGUS SHERIDAN WY SYSTEM WY5600052	NO CITY	0	Inactive
CROW AGENCY WATER PLANT	CROW AGENCY	1,200	Inactive
FORT SMITH W AND S DIST FORT SMITH TR PK	FORT SMITH	350	Inactive
FORT SMITH WATER AND SEWER DIST	FORT SMITH	100	Inactive
FORT SMITH WATER AND SEWER DISTRICT	WORDEN	450	Active
HARDIN CITY OF	HARDIN	3,500	Active
LODGE GRASS TOWN OF	LODGE GRASS	480	Active
QUALITY WATER	HARDIN	50	Inactive
WEGNER WATER SERVICE HAULER	HARDIN	50	Active
WYOLA WATER CORP	WYOLA	125	Inactive
YELLOWTAIL DAM GC SYSTEM	YELLOWTAIL	125	Active
YELLOWTAIL DAM MK UPPER SYSTEM	YELLOWTAIL	40	Inactive