Water quality in Denison, Iowa
Denison is in Crawford County. 10 active public water systems serve the county; 4 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Crawford County
9 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Denison Water Supply Denison |
9,381 | 0 | 6.7 mi | |
| W Central Rwa Denison Subsys Denison |
2,428 | 0 | 6.7 mi | |
| Vail Water Supply Vail |
383 | 0 | 6.9 mi | |
| Deloit Muni Water Supply Deloit |
250 | 2 | 10.0 mi | |
| Westside Water Supply Westside |
277 | 1 | 10.4 mi | |
| Dow City Water Works Dow City |
467 | 0 | 13.1 mi | |
| Kiron Water Supply Kiron |
257 | 2 | 16.4 mi | |
| Schleswig Munic Water Supply Schleswig |
803 | 0 | 16.7 mi | |
| Charter Oak Water Supply Charter Oak |
522 | 0 | 19.2 mi |
About this data
Water systems are matched to Crawford County, nearest to Denison 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.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 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.