Water quality for ZIP code 51003
ZIP 51003 covers Alton and Orange City in Sioux County, Iowa, one of 13 ZIP codes in the county. 16 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 Sioux County
15 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Orange City Municipal Water Department Orange City |
6,267 | 0 | 3.6 mi | |
| Granville Water Supply Granville |
310 | 0 | 5.6 mi | |
| Hospers Municipal Water Dept Hospers |
718 | 0 | 7.0 mi | |
| Rural Water System #1 Hospers |
3,428 | 1 | 7.0 mi | |
| Maurice Municipal Water Supply Maurice |
265 | 0 | 9.9 mi | |
| Sioux Center Municipal Water Department Sioux Center |
8,231 | 0 | 10.9 mi | |
| Southern Sioux County Rural Water Ireton |
5,420 | 0 | 12.1 mi | |
| Boyden Municipal Water Supply Boyden |
709 | 0 | 13.8 mi | |
| Lewis and Clark Regional Water System Hull |
25 | 0 | 15.7 mi | |
| Hull Water Supply Hull |
2,384 | 0 | 15.7 mi | |
| Ireton Water Supply Ireton |
590 | 0 | 17.0 mi | |
| Matlock Water Supply Matlock |
74 | 0 | 17.7 mi | |
| Rock Valley Rural Water District Rock Valley |
2,250 | 0 | 21.2 mi | |
| Rock Valley Water Supply Rock Valley |
4,059 | 1 | 21.3 mi | |
| Hawarden Water Supply Hawarden |
2,700 | 0 | 25.1 mi |
About this data
Water systems are matched to Sioux 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.