Water quality for ZIP code 51340
ZIP 51340 covers Fostoria in Clay County, Iowa, one of 10 ZIP codes in the county. 6 active public water systems serve the county; 0 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Clay County
5 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| Iowa Lakes Regional Water Spencer |
6,755 | 0 | |
| Everly Water Supply Everly |
575 | 0 | |
| Peterson Municipal Water Supply Peterson |
322 | 0 | |
| Fostoria Municipal Water Supply Fostoria |
233 | 0 | |
| Dickens Water Works Spencer |
146 | 0 |
About this data
Water systems are matched to Clay 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.