Water quality for ZIP code 51045
ZIP 51045 covers Oyens in Plymouth County, Iowa, one of 11 ZIP codes in the county. 13 active public water systems serve the county; 6 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Plymouth County
9 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| Remsen Municipal Utilities Remsen |
1,678 | 0 | |
| Akron, City of Akron |
1,558 | 1 | |
| Kingsley Water Supply Kingsley |
1,396 | 0 | |
| Hinton Water Supply Hinton |
935 | 1 | |
| Merrill Municipal Water Supply Merrill |
717 | 0 | |
| Brunsville Municipal Water Supply Brunsville |
129 | 0 | |
| Westfield Water Supply Westfield |
123 | 0 | |
| Oyens Water Supply Oyens |
92 | 1 | |
| Craig Water Works Craig |
79 | 3 |
Non-community systems in Plymouth County (3: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Country Celebrations Event Center Sioux City |
200 | 3 | 1 | |
|
Hidden Acres Golf Course LLC Sioux City |
100 | 0 | 0 | |
|
Hole N the Wall Lodge Akron |
90 | 1 | 0 |
About this data
Water systems are matched to Plymouth County, the county this ZIP code lies in, largest 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.
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.