Water quality for ZIP code 51235
ZIP 51235 covers Doon in Lyon County, Iowa, one of 8 ZIP codes in the county. 12 active public water systems serve the county; 2 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Lyon County
11 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Lyon-Sioux Rws-Doon Doon |
1,765 | 0 | 1.3 mi | |
| Alvord Municipal Water Supply Alvord |
206 | 0 | 5.4 mi | |
| Lyon-Sioux Rws-Rock Rapids Rock Rapids |
1,187 | 0 | 9.1 mi | |
| Rock Rapids Municipal Water Works Rock Rapids |
2,611 | 0 | 9.2 mi | |
| Lyon-Sioux Rws-Boyden Rock Rapids |
605 | 1 | 9.5 mi | |
| Inwood Water Supply Inwood |
928 | 0 | 10.7 mi | |
| George Water Supply George |
1,082 | 0 | 11.4 mi | |
| Lester Water Supply Lester |
296 | 0 | 11.5 mi | |
| Larchwood Water Supply Larchwood |
926 | 1 | 15.6 mi | |
| Lyon-Sioux Rws-Big Sioux Rock Rapids |
1,530 | 0 | 18.3 mi | |
| Little Rock Water Supply Little Rock |
441 | 0 | 19.8 mi |
About this data
Water systems are matched to Lyon County, the county this ZIP code lies in, nearest to the ZIP code's centre 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.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.