Revised Total Coliform Rule (RTCR) violations in Iowa
341 active public water systems in Iowa had a Revised Total Coliform Rule (RTCR) violation in the past three years, 58 of them in the latest quarter of EPA's data. What Revised Total Coliform Rule (RTCR) is and why it matters.
Health effects: Total coliform bacteria indicate that the disinfection barrier has been breached or fecal contamination is entering the system. E. coli specifically indicates fecal contamination and the possible presence of disease-causing pathogens (norovirus, Salmonella, Shigella, Campylobacter). Illness can be severe in elderly, young children, and immunocompromised individuals.
Systems with a Revised Total Coliform Rule (RTCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Pomeroy Water Supply Pomeroy · Calhoun County |
671 | 2 | 0 | |
|
Elk Horn Muni Water Works Elk Horn · Shelby County |
631 | 2 | 0 | |
|
Williams Travel Center Williams · Hamilton County |
610 | 2 | 0 | |
|
Caseys Store (nichols) #2472 Nichols · Muscatine County |
603 | 3 | 1 | |
|
Brighton Municipal Water Supply Brighton · Washington County |
600 | 1 | 0 | |
|
Agri Star Meat and Poultry LLC Postville · Allamakee County |
550 | 1 | 0 | |
|
Blackbird Bend Casino County |
546 | 3 | 0 | |
|
Richland Water Supply Richland · Keokuk County |
542 | 1 | 0 | |
|
Zearing Water Department Zearing · Story County |
528 | 3 | 0 | |
|
Shops Above the Wapsi Anamosa · Jones County |
515 | 4 | 0 | |
|
Ellsworth Public Water Supply Ellsworth · Hamilton County |
514 | 3 | 1 | |
|
Desoto Natl Wildlife Refuge-Visitor Ctr Missouri Valley · Harrison County |
505 | 2 | 0 | |
|
Russell Water Supply Russell · Lucas County |
477 | 3 | 2 | |
|
Lime Springs Water Supply Lime Springs · Howard County |
473 | 1 | 0 | |
|
Jefferson County Rural Water District Fairfield · Jefferson County |
468 | 3 | 1 | |
|
Albion Water Department Albion · Marshall County |
448 | 2 | 0 | |
|
Batavia Water Works Batavia · Jefferson County |
430 | 1 | 0 | |
|
Lamont Water Supply Lamont · Buchanan County |
429 | 1 | 0 | |
|
Oxford Junction Water Supply Oxford Junction · Jones County |
424 | 1 | 0 | |
|
Miles Water Department Miles · Jackson County |
408 | 1 | 0 | |
|
Epic Event Center Marion · Linn County |
404 | 3 | 1 | |
|
Camp Ingawanis-Maple and Ranger Well Waverly · Bremer County |
402 | 2 | 1 | |
|
Dubuque Sports Complex Dubuque · Dubuque County |
400 | 3 | 0 | |
|
Columbus City Public Water Supply Columbus City · Louisa County |
392 | 1 | 0 | |
|
Milton Water Supply Milton · Van Buren County |
380 | 1 | 0 | |
|
Massena Water Supply Massena · Cass County |
364 | 5 | 1 | |
|
Sunrise Village Mobile Home PK Iowa City · Johnson County |
340 | 3 | 1 | |
|
Diagonal Water Department Diagonal · Ringgold County |
338 | 5 | 2 | |
|
Terril Municipal Waterworks Terril · Dickinson County |
334 | 1 | 0 | |
|
Lofted View Events Sioux City · Woodbury County |
314 | 2 | 0 | |
|
Grinnell MHP MHC Grinnell · Poweshiek County |
313 | 2 | 1 | |
|
Irwin Municipal Supply Irwin · Shelby County |
313 | 1 | 0 | |
|
Palisades Kepler Park Office Mount Vernon · Linn County |
308 | 1 | 0 | |
|
Fertile Municipal Water Fertile · Worth County |
306 | 3 | 0 | |
|
Bode Municipal Water Supply Bode · Humboldt County |
304 | 1 | 0 | |
|
Libertyville Water Works Libertyville · Jefferson County |
304 | 2 | 0 | |
|
Luana Water Works Luana · Clayton County |
301 | 1 | 0 | |
|
Faith Community Church Palmer · Pocahontas County |
300 | 1 | 0 | |
|
The Lodge Steamboat Rock · Hardin County |
300 | 1 | 0 | |
|
Timbers Edge Wedding & Event Centre Steamboat Rock · Hardin County |
300 | 1 | 0 | |
|
Kimballton Utilities Kimballton · Audubon County |
287 | 2 | 1 | |
|
Coralville Lake-Ad Bldg Iowa City · Johnson County |
275 | 1 | 0 | |
|
Protivin Water Supply Protivin · Howard County |
269 | 1 | 0 | |
|
Steamboat Rock Water Dept Steamboat Rock · Hardin County |
264 | 5 | 0 | |
|
Airport National Public Golf Complex Cedar Rapids · Linn County |
260 | 1 | 0 | |
|
Muscatine Muni Golf Course Muscatine · Muscatine County |
260 | 1 | 0 | |
|
Corner Market Mccausland · Scott County |
252 | 3 | 1 | |
|
Three Fingers Campground Forest City · Winnebago County |
252 | 1 | 0 | |
|
Crawford Creek Park Ida Grove · Ida County |
250 | 1 | 0 | |
|
Defiance Water Department Defiance · Shelby County |
250 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Revised Total Coliform Rule (RTCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Revised Total Coliform Rule (RTCR) 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.