Water quality in Johnston, Iowa
Johnston is in Polk County. 39 active public water systems serve the county; 10 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Polk County
37 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Camp Dodge Water Supply Johnston |
1,169 | 4 | 1.5 mi | |
| Oakwood Park Water Inc. Ankeny |
218 | 0 | 3.4 mi | |
| Hickory Hollow Water Service, Inc. Ankeny |
375 | 0 | 3.5 mi | |
| Park View Village Grimes |
1,800 | 1 | 3.6 mi | |
| Grimes Water Supply Grimes |
17,997 | 0 | 3.7 mi | |
| Grimes MHP Grimes |
163 | 2 | 4.6 mi | |
| Ciww (grimes) Grimes |
25 | 0 | 4.6 mi | |
| Polk City Water Supply Polk City |
6,533 | 0 | 5.1 mi | |
| Urbandale Water Utility Urbandale |
45,605 | 0 | 5.3 mi | |
| Rocklyn MHP Urbandale |
103 | 1 | 5.4 mi | |
| Ciww ( Polk City) Polk City |
25 | 0 | 5.6 mi | |
| Ankeny, City of Ankeny |
76,207 | 0 | 6.1 mi | |
| Southwest Polk Water Service, Inc. West Des Moines |
393 | 0 | 6.3 mi | |
| Autumn Ridge Estates MHP Ankeny |
1,032 | 0 | 6.5 mi | |
| Greenwood Acres Water Co. Ankeny |
325 | 0 | 6.8 mi | |
| Clive Water Department Clive |
20,277 | 0 | 7.2 mi | |
| Sunnybrook Mobile Home Park Berwick |
343 | 0 | 9.0 mi | |
| Stover Heights MHC Des Moines |
393 | 0 | 9.2 mi | |
| Des Moines Water Works Des Moines |
246,055 | 0 | 9.6 mi | |
| West Des Moines Water Works West Des Moines |
73,959 | 0 | 9.7 mi | |
| Yes Regency Manor LLC Des Moines |
710 | 0 | 10.5 mi | |
| The Meadows Des Moines |
702 | 0 | 10.5 mi | |
| Val Vista Estates Des Moines |
553 | 0 | 10.5 mi | |
| Ewing Trace MHC Des Moines |
455 | 0 | 10.5 mi | |
| Hillock Estates Des Moines |
228 | 1 | 10.5 mi |
Non-community systems in Polk County (1: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Vca Avondale Animal Hospital Des Moines |
64 | 2 | 1 |
About this data
Water systems are matched to Polk County, nearest to Johnston first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
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.