Day County, South Dakota Water Systems

Day County, South Dakota

13 community water systems on record — 10 active, 3 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 South Dakota’s official records. Always confirm current status with South Dakota before making decisions based on this information.

Community water systems in Day County, South Dakota

System name	City	Population served	Status
ANDOVER	ANDOVER	139	Inactive
BRISTOL	BRISTOL	288	Active
BROWN-DAY-MARSHALL RWS	BRITTON	5,673	Active
CLARK RURAL WATER SYSTEM	CLARK	2,325	Active
CLARK RURAL WATER-KAMPESKA	CLARK	602	Active
GRENVILLE	GRENVILLE	48	Active
KIDDERS KOURT	WEBSTER	25	Inactive
PIERPONT	PIERPONT	129	Active
ROSLYN	ROSLYN	181	Active
WAUBAY	WAUBAY	473	Active
WEB WATER DEVELOPMENT ASSOCIATION	ABERDEEN	20,750	Active
WEBSTER	WEBSTER	1,728	Active
WEBSTER WATER DEPT	WEBSTER	2,236	Inactive