Iowa
Washington County drinking water quality
25 active public water systems serve 33,345 people in Washington County. 13 are compliant, 12 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.
Community water systems
14 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Wapello Rural Water Assoc. Ottumwa |
17,263 | 0 | 0 | |
|
Washington Water Department Washington |
7,362 | 0 | 0 | |
|
Kalona Water Dept Kalona |
2,630 | 0 | 0 | |
|
Wellman Municipal Waterworks Wellman |
1,524 | 1 | 1 | |
|
Riverside Water Supply Riverside |
1,060 | 0 | 0 | |
|
Brighton Municipal Water Supply Brighton |
600 | 1 | 0 | |
|
Ainsworth Water Works Ainsworth |
511 | 0 | 0 | |
|
Crawfordsville Water Supply Crawfordsville |
277 | 0 | 0 | |
|
West Chester Muni Wtr Supply West Chester |
144 | 1 | 0 | |
|
Timberline Estates Riverside |
95 | 0 | 0 | |
|
Linn Hollow MHP LLC Washington |
68 | 1 | 0 | |
|
City of Kalona Southtown Kalona |
60 | 0 | 0 | |
|
Sunset Hills Estates Part 2 Kalona |
45 | 0 | 0 | |
|
Waldschmidt Subdivision Riverside |
45 | 1 | 0 |
Non-community systems (11: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Highland High School Riverside |
405 | 0 | 0 | |
|
Ainsworth 4 Corners Restaurant Ainsworth |
400 | 0 | 0 | |
|
Hillcrest Academy Kalona |
202 | 3 | 0 | |
|
Mid-Prairie Home School ED Center Kalona |
160 | 0 | 0 | |
|
Marr Park Ainsworth |
148 | 1 | 0 | |
|
Pathway Christian School Kalona |
115 | 3 | 1 | |
|
Dairy Mart Ainsworth |
62 | 1 | 1 | |
|
Him Hearth N Home Cooking Kalona |
57 | 2 | 1 | |
|
Crooked Creek Christian Camp Washington |
43 | 3 | 0 | |
|
Eagles Nest Tap LLC Coppock |
42 | 0 | 0 | |
|
Windmill Ridge Campground Kalona |
27 | 4 | 1 |
Inactive systems (42, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Iowa records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.