Nitrite violations in Iowa
50 active public water systems in Iowa had a Nitrite violation in the past three years, 13 of them in the latest quarter of EPA's data. What Nitrite is and why it matters.
Systems with a Nitrite violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Jewell Water Supply Jewell · Hamilton County |
1,216 | 1 | 0 | |
|
Armstrong Water Supply Armstrong · Emmet County |
918 | 3 | 0 | |
|
Wheatland City Water Supply Wheatland · Clinton County |
775 | 2 | 0 | |
|
Schaller Water Supply Schaller · Sac County |
729 | 1 | 0 | |
|
Dows Water Supply Dows · Wright County |
526 | 1 | 0 | |
|
Albion Water Department Albion · Marshall County |
448 | 2 | 0 | |
|
Ringsted Water Supply Ringsted · Emmet County |
365 | 1 | 0 | |
|
Coulter Water Supply Coulter · Franklin County |
219 | 3 | 0 | |
|
Palmer Water Supply Palmer · Pocahontas County |
138 | 1 | 0 | |
|
Varina Water Supply Varina · Pocahontas County |
68 | 2 | 0 | |
|
Glenn Oaks Addition Toddville · Linn County |
58 | 6 | 2 | |
|
Walnut Grove Pk-Clin Conservat Grand Mound · Clinton County |
40 | 1 | 0 | |
|
Parkers Pit Stop Bellevue · Jackson County |
25 | 3 | 0 | |
|
Isu Ames · Story County |
42,000 | 1 | 0 | |
|
Marion Co. Rural Water District Knoxville · Marion County |
5,687 | 2 | 1 | |
|
Carter Lake Water District Carter Lake · Pottawattamie County |
3,791 | 2 | 1 | |
|
Park View Village Grimes · Polk County |
1,800 | 1 | 0 | |
|
Granger Muni Water Supply Granger · Dallas County |
1,654 | 2 | 1 | |
|
Urban Bluffs North Council Bluffs · Pottawattamie County |
1,558 | 1 | 0 | |
|
Bedford Water Works Bedford · Taylor County |
1,533 | 2 | 0 | |
|
Rockwell Water Supply Rockwell · Cerro Gordo County |
1,071 | 1 | 0 | |
|
Treynor Water Department Treynor · Pottawattamie County |
1,049 | 1 | 0 | |
|
Woodland Camp Property Owners Little Sioux · Harrison County |
1,037 | 2 | 0 | |
|
Elkhart Water Supply Elkhart · Polk County |
882 | 1 | 0 | |
|
Adair Municipal Water Supply Adair · Adair County |
809 | 1 | 0 | |
|
Blairstown Water Supply Blairstown · Benton County |
738 | 1 | 0 | |
|
Pomeroy Water Supply Pomeroy · Calhoun County |
671 | 2 | 0 | |
|
Titonka Water Supply Titonka · Kossuth County |
511 | 2 | 0 | |
|
Irua Pershing Utilities Pershing · Marion County |
488 | 2 | 1 | |
|
Humeston Water Plant Humeston · Wayne County |
465 | 3 | 1 | |
|
Allerton Water Works Allerton · Wayne County |
430 | 1 | 0 | |
|
Lawler Water Supply Lawler · Chickasaw County |
406 | 1 | 0 | |
|
Bayard Water Supply Bayard · Guthrie County |
405 | 2 | 0 | |
|
Mondamin Water Supply Mondamin · Harrison County |
339 | 2 | 0 | |
|
Diagonal Water Department Diagonal · Ringgold County |
338 | 5 | 2 | |
|
Lakota Water Supply Lakota · Kossuth County |
267 | 1 | 0 | |
|
Leland Water Supply Leland · Winnebago County |
249 | 1 | 0 | |
|
Ladora Water Supply Ladora · Iowa County |
229 | 5 | 3 | |
|
Cantril Water Supply Cantril · Van Buren County |
224 | 2 | 0 | |
|
Jamaica Water Supply Jamaica · Guthrie County |
195 | 3 | 0 | |
|
Woden Water Supply Woden · Hancock County |
188 | 3 | 0 | |
|
Soldier Water Supply Soldier · Monona County |
180 | 2 | 0 | |
|
Grimes MHP Grimes · Polk County |
163 | 2 | 1 | |
|
Hole N the Wall Lodge Akron · Plymouth County |
90 | 1 | 0 | |
|
Deer Hunters Run Van Meter · Dallas County |
78 | 2 | 0 | |
|
Bartlett Shores Bartlett · Fremont County |
58 | 2 | 1 | |
|
Pine Creek Golf Course Mason City · Cerro Gordo County |
55 | 2 | 0 | |
|
Knierim Water Supply Knierim · Calhoun County |
53 | 1 | 0 | |
|
Timberlake Swisher · Johnson County |
52 | 5 | 1 | |
|
Timberlane Water Association Fort Dodge · Webster County |
48 | 3 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Nitrite, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nitrite 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. Retrieved from ECHO on Oct 11, 2026.