Iowa
Calhoun County drinking water quality
14 active public water systems serve 8,032 people in Calhoun County. 7 are compliant, 7 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
12 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Rockwell City Water Supply Rockwell City |
2,250 | 1 | 0 | |
|
Lake City Water Supply Lake City |
1,731 | 1 | 0 | |
|
Manson Water Supply Manson |
1,727 | 2 | 1 | |
|
Pomeroy Water Supply Pomeroy |
671 | 2 | 0 | |
|
Lohrville Water Supply Lohrville |
381 | 0 | 0 | |
|
Farnhamville Water Supply Farnhamville |
379 | 0 | 0 | |
|
Twin Lakes Utilities Rockwell City |
300 | 1 | 0 | |
|
Lytton Water Department Lytton |
282 | 0 | 0 | |
|
Somers Water Works Somers |
128 | 1 | 0 | |
|
Knierim Water Supply Knierim |
53 | 1 | 0 | |
|
Rinard Water Supply Rinard |
38 | 0 | 0 | |
|
Jolley Water Supply Jolley |
28 | 0 | 0 |
Non-community systems (2: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Twin Lakes Golf Club Rockwell City |
39 | 0 | 0 | |
|
Yetter Municipal Water Supply Yetter |
25 | 0 | 0 |
Inactive systems (14, 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.