E. coli (Escherichia coli) violations in Iowa
12 active public water systems in Iowa had a E. coli (Escherichia coli) violation in the past three years, 11 of them in the latest quarter of EPA's data. What E. coli (Escherichia coli) is and why it matters.
Systems with a E. coli (Escherichia coli) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Missouri Valley Water Supply Missouri Valley · Harrison County |
2,678 | 2 | 1 | |
|
Elkader Grace Evangelical Free Church Elkader · Clayton County |
152 | 3 | 2 | |
|
Culvers Lawn and Garden Marion · Linn County |
120 | 2 | 1 | |
|
Kalmes Store Saint Donatus · Jackson County |
112 | 2 | 2 | |
|
Hidden Acres Subdivision Solon · Johnson County |
90 | 3 | 1 | |
|
Bulgers Hollow Recreation Area Clinton · Clinton County |
77 | 3 | 1 | |
|
Obies Hurstville · Jackson County |
64 | 3 | 2 | |
|
Montipark LLC Monticello · Jones County |
60 | 10 | 4 | |
|
Fox Valley Acres Muscatine · Muscatine County |
36 | 5 | 2 | |
|
Bennett Pk-Cedar Conservation Lowden · Cedar County |
25 | 3 | 2 | |
|
Odessa Dells Wapello · Louisa County |
25 | 1 | 1 | |
|
Camp Little Cloud Epworth · Dubuque County |
55 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved E. coli (Escherichia coli), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not E. coli (Escherichia coli) alone.
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.