All water systems in Iowa
1,804 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Bedford Water Works Bedford · Taylor County |
1,533 | 2 | 0 | |
|
Lyon-Sioux Rws-Big Sioux Rock Rapids · Lyon County |
1,530 | 0 | 0 | |
|
Oakland Munic Water Utility Oakland · Pottawattamie County |
1,524 | 0 | 0 | |
|
Wellman Municipal Waterworks Wellman · Washington County |
1,524 | 1 | 1 | |
|
Holstein, City of Holstein · Ida County |
1,511 | 0 | 0 | |
|
Brooklyn Water Department Brooklyn · Poweshiek County |
1,505 | 0 | 0 | |
|
Monona Municipal Water Dept Monona · Clayton County |
1,471 | 0 | 0 | |
|
Lenox Water Supply Lenox · Taylor County |
1,470 | 0 | 0 | |
|
Rathbun Regional Water (mount Pleasant) Mount Pleasant · Henry County |
1,465 | 0 | 0 | |
|
Cherokee Rws Mill Creek Subsystem Cherokee · Cherokee County |
1,451 | 0 | 0 | |
|
Earlham Municipal Waterworks Earlham · Madison County |
1,446 | 0 | 0 | |
|
Clarinda Treatment Complex Clarinda · Page County |
1,439 | 2 | 0 | |
|
State Center Muni Water Dept State Center · Marshall County |
1,411 | 0 | 0 | |
|
Palo Water Supply Palo · Linn County |
1,407 | 0 | 0 | |
|
Logan Water Supply Logan · Harrison County |
1,397 | 1 | 0 | |
|
Kingsley Water Supply Kingsley · Plymouth County |
1,396 | 0 | 0 | |
|
Roland Water Supply Roland · Story County |
1,394 | 0 | 0 | |
|
Manning Water Supply Manning · Carroll County |
1,392 | 0 | 0 | |
|
Sanborn Water Supply Sanborn · O'Brien County |
1,392 | 0 | 0 | |
|
Sirwa #3 (leon) Decatur City · Decatur County |
1,373 | 0 | 0 | |
|
Nora Springs Water Supply Nora Springs · Floyd County |
1,369 | 0 | 0 | |
|
Mahaska Rural Water (new Sharon) New Sharon · Mahaska County |
1,368 | 1 | 0 | |
|
Lone Tree Muni Water System Lone Tree · Johnson County |
1,357 | 2 | 0 | |
|
Woodward Water Supply Woodward · Dallas County |
1,346 | 1 | 0 | |
|
Dike Water Supply Dike · Grundy County |
1,306 | 0 | 0 | |
|
Laurens Water Supply Laurens · Pocahontas County |
1,301 | 1 | 0 | |
|
Lake Ridge, Incorporated Iowa City · Johnson County |
1,300 | 4 | 2 | |
|
Tyson Fresh Meats INC (columbus Jct) Columbus Junction · Louisa County |
1,300 | 0 | 0 | |
|
Dysart Water Supply Dysart · Tama County |
1,281 | 1 | 0 | |
|
Shell Rock Muni Water Supp Shell Rock · Butler County |
1,269 | 0 | 0 | |
|
Manly Water Supply Manly · Worth County |
1,266 | 0 | 0 | |
|
Central City Water Supply Central City · Linn County |
1,264 | 0 | 0 | |
|
Fayette Water Supply Fayette · Fayette County |
1,256 | 1 | 0 | |
|
Clarksville Water Supply Clarksville · Butler County |
1,254 | 0 | 0 | |
|
Alton Municipal Water Department Alton · Sioux County |
1,248 | 0 | 0 | |
|
Amana Society Water System North Middle Amana · Iowa County |
1,248 | 1 | 0 | |
|
Coon Rapids Municipal Utilities Coon Rapids · Carroll County |
1,242 | 0 | 0 | |
|
Anamosa State Penitentiary Anamosa · Jones County |
1,230 | 0 | 0 | |
|
Elkader Muni Water Dept Elkader · Clayton County |
1,219 | 0 | 0 | |
|
Jewell Water Supply Jewell · Hamilton County |
1,216 | 1 | 0 | |
|
Caseys General Store (anamosa) Fairview · Jones County |
1,215 | 1 | 1 | |
|
Melcher-Dallas Water Supply Melcher-dallas · Marion County |
1,213 | 0 | 0 | |
|
Gilbert Water Supply Gilbert · Story County |
1,211 | 2 | 0 | |
|
Tripoli Water Supply Tripoli · Bremer County |
1,191 | 0 | 0 | |
|
Louisa-Muscatine Community School Letts · Louisa County |
1,190 | 0 | 0 | |
|
Lyon-Sioux Rws-Rock Rapids Rock Rapids · Lyon County |
1,187 | 0 | 0 | |
|
Buffalo Water Supply Buffalo · Scott County |
1,176 | 0 | 0 | |
|
Camp Dodge Water Supply Johnston · Polk County |
1,169 | 4 | 0 | |
|
F W Kent Park Oxford · Johnson County |
1,169 | 1 | 0 | |
|
Lake Park Municipal Utilities Lake Park · Dickinson County |
1,167 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
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.