Iowa
Story County drinking water quality
21 active public water systems serve 158,728 people in Story County. 12 are compliant, 9 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
20 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Ames Water Treatment Plant Ames |
55,177 | 1 | 0 | |
|
Isu Ames |
42,000 | 1 | 0 | |
|
IA Regional Utilities Assoc (waverly) Waverly |
37,820 | 0 | 0 | |
|
Nevada Water Supply Nevada |
6,925 | 0 | 0 | |
|
Huxley Waterworks Dept Huxley |
4,244 | 0 | 0 | |
|
Story City Water Dept Story City |
3,357 | 1 | 0 | |
|
Slater Muni Water Dept Slater |
1,548 | 2 | 1 | |
|
Roland Water Supply Roland |
1,394 | 0 | 0 | |
|
Gilbert Water Supply Gilbert |
1,211 | 2 | 0 | |
|
Maxwell Water Department Maxwell |
859 | 1 | 0 | |
|
Colo Water Supply Colo |
853 | 0 | 0 | |
|
Cambridge Water Supply Cambridge |
832 | 0 | 0 | |
|
Zearing Water Department Zearing |
528 | 3 | 0 | |
|
Collins Water Supply Collins |
505 | 0 | 0 | |
|
McCallsburg Water Supply Mccallsburg |
353 | 1 | 1 | |
|
Kelley Water Supply Kelley |
304 | 0 | 0 | |
|
New Horizons MHP LLC Huxley |
303 | 0 | 0 | |
|
Maple Grove MHC Ames |
160 | 0 | 0 | |
|
Hammond Estates Slater |
150 | 0 | 0 | |
|
Squaw Valley South Subdivision Ames |
105 | 0 | 0 |
Non-community systems (1: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Alluvial Brewing Company Ames |
100 | 1 | 0 |
Inactive systems (53, 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.