Water quality for ZIP code 50056
ZIP 50056 covers Colo in Story County, Iowa, one of 15 ZIP codes in the county. 21 active public water systems serve the county; 9 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Story County
19 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Collins Water Supply Collins |
505 | 0 | 7.6 mi | |
| Nevada Water Supply Nevada |
6,925 | 0 | 8.0 mi | |
| Squaw Valley South Subdivision Ames |
105 | 0 | 9.1 mi | |
| Maxwell Water Department Maxwell |
859 | 1 | 9.8 mi | |
| Zearing Water Department Zearing |
528 | 3 | 10.1 mi | |
| McCallsburg Water Supply Mccallsburg |
353 | 1 | 11.5 mi | |
| Cambridge Water Supply Cambridge |
832 | 0 | 14.4 mi | |
| Roland Water Supply Roland |
1,394 | 0 | 14.9 mi | |
| Ames Water Treatment Plant Ames |
55,177 | 1 | 17.0 mi | |
| New Horizons MHP LLC Huxley |
303 | 0 | 17.4 mi | |
| Huxley Waterworks Dept Huxley |
4,244 | 0 | 17.5 mi | |
| Isu Ames |
42,000 | 1 | 17.8 mi | |
| Gilbert Water Supply Gilbert |
1,211 | 2 | 19.1 mi | |
| Story City Water Dept Story City |
3,357 | 1 | 19.2 mi | |
| Kelley Water Supply Kelley |
304 | 0 | 19.5 mi | |
| Maple Grove MHC Ames |
160 | 0 | 21.6 mi | |
| Slater Muni Water Dept Slater |
1,548 | 2 | 22.2 mi | |
| Hammond Estates Slater |
150 | 0 | 22.3 mi | |
| IA Regional Utilities Assoc (waverly) Waverly |
37,820 | 0 | 64.7 mi |
Non-community systems in Story County (1: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Alluvial Brewing Company Ames |
100 | 1 | 0 |
About this data
Water systems are matched to Story 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.