Water quality in Duncan, Iowa
Duncan is in Hancock County. 18 active public water systems serve the county; 7 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Hancock County
7 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Britt Water Works Britt |
2,064 | 2 | 5.2 mi | |
| Klemme Water Works Klemme |
441 | 1 | 8.6 mi | |
| Crystal Lake Water Supply Crystal Lake |
255 | 0 | 9.1 mi | |
| Kanawha Water Supply Kanawha |
658 | 0 | 12.8 mi | |
| Woden Water Supply Woden |
188 | 3 | 13.3 mi | |
| Goodell Water Supply Goodell |
140 | 0 | 13.5 mi | |
| Corwith Water Supply Corwith |
266 | 0 | 15.1 mi |
Non-community systems in Hancock County (10: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Michael Foods Britt Britt |
110 | 1 | 0 | |
|
Hancock County Fairgrounds Britt |
27 | 1 | 0 | |
|
Peace Reformed Church Garner |
105 | 3 | 1 | |
|
New Horizon Coop/opal Foods Britt Britt |
30 | 0 | 0 | |
|
Slippery Elm Golf Course Klemme |
50 | 0 | 0 | |
|
ST John Lutheran Church Garner |
98 | 0 | 0 | |
|
Hillside Golf Wesley |
62 | 1 | 0 | |
|
Pilot Knob Lutheran Church Forest City |
60 | 0 | 0 | |
|
Eldred Sherwood Park Goodell |
45 | 0 | 0 | |
|
Hawkeye Pride Egg Farm LLP Corwith |
100 | 0 | 0 |
About this data
Water systems are matched to Hancock County, nearest to Duncan 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.
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.