Winneshiek County, Iowa Water Systems

Winneshiek County, Iowa

18 community water systems on record — 13 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 Iowa’s official records. Always confirm current status with Iowa before making decisions based on this information.

Community water systems in Winneshiek County, Iowa

System name	City	Population served	Status
CALMAR WATER SUPPLY	CALMAR	1,125	Active
CASTALIA WATER WORKS	OSSIAN	145	Active
DECORAH WATER DEPARTMENT	DECORAH	7,615	Active
DEERFIELD HEIGHTS ASSOCIATION	OSSIAN	28	Active
FORT ATKINSON WATER WORKS	FORT ATKINSON	347	Active
FRANKVILLE RWD	OSSIAN	135	Active
FREEPORT WATER DISTRICT	DECORAH	775	Active
HAUGEN HUMMEL ENTERPRIZES SUBD	DECORAH	25	Inactive
HAUGEN HUMMEL, SUBDIVISION 2	DECORAH	92	Inactive
HIGH POINT EAST	DECORAH	25	Inactive
NORTH TERRACE MOBILE HOME PARK	DECORAH	90	Inactive
ONEOTA RIVERVIEW CARE FACILITY	DECORAH	70	Inactive
OSSIAN WATER SUPPLY	OSSIAN	802	Active
PLANTATION COUNTRY VIEW SUBDIVISION	FREDERICKSBURG	32	Active
RIDGEWAY, CITY OF	RIDGEWAY	275	Active
SCENIC VIEW ESTATES	FREDERICKSBURG	78	Active
SHERMAN PLACE WATER & ROAD, INC.	FREDERICKSBURG	73	Active
SPILLVILLE WATER SUPPLY	SPILLVILLE	371	Active