Iowa
1,091 Utilities
Serving: 2,771,000
Data available: 2010-2015
Contaminants Found: 89
EWG's drinking water quality report for Iowa shows results of tests conducted by the water utilities in Iowa and provided to EWG by the Iowa Department of Natural Resources.
Below are utilities in Iowa serving over 10,000 people, listed alphabetically. Click the "more" button below to get the full list of utilities serving over 10,000 people.
Large utilities in Iowa
Utilities that accumulated/accrued the most violation points as of October 2015 to September 2018 in Iowa
The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.
Large utilities that accumulated/accrued the most violation points as of October 2015 to September 2018 in Iowa
The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.
| Utility | Location | People Served | Violation Points |
|---|---|---|---|
| Warren Water District | Indianola, IA | 18,045 | 1 |
Contaminants found in Iowa above health guidelines
| Found above health guidelines | Found | ||||||
|---|---|---|---|---|---|---|---|
| Contaminant | # of Utilities | People Served | # of Utilities | People Served | |||
Total trihalomethanes (TTHMs) | 559 | 2,390,026 | 561 | 2,471,508 | |||
Chloroform | 543 | 2,357,087 | 544 | 2,382,293 | |||
Bromodichloromethane | 529 | 2,324,885 | 529 | 2,324,885 | |||
Dichloroacetic acid | 487 | 2,213,135 | 491 | 2,240,695 | |||
Dibromochloromethane | 483 | 2,133,231 | 483 | 2,133,231 | |||
Trichloroacetic acid | 439 | 1,714,567 | 459 | 1,957,866 | |||
Chromium (hexavalent) | 168 | 1,660,734 | 205 | 1,753,739 | |||
Nitrate | 420 | 1,660,329 | 478 | 1,782,765 | |||
Radium-228 | 487 | 1,350,476 | 487 | 1,350,476 | |||
Bromoform | 241 | 1,272,527 | 266 | 1,511,949 | |||
Radium-226 | 459 | 744,025 | 459 | 744,025 | |||
Atrazine | 33 | 268,839 | 59 | 971,217 | |||
Arsenic | 58 | 248,640 | 58 | 248,640 | |||
Chlorite | 25 | 217,748 | 25 | 217,748 | |||
Chlorate | 18 | 184,679 | 165 | 1,360,244 | |||
Tetrachloroethylene (perchloroethylene) | 7 | 125,517 | 7 | 125,517 | |||
Trichloroethylene | 5 | 119,371 | 5 | 119,371 | |||
Strontium | 5 | 84,632 | 222 | 1,950,730 | |||
Uranium | 28 | 42,670 | 28 | 42,670 | |||
1,4-Dioxane | 4 | 11,511 | 67 | 710,070 | |||
Chloromethane | 4 | 8,700 | 9 | 9,410 | |||
Manganese | 1 | 3,931 | 3 | 8,994 | |||
Thallium | 2 | 2,409 | 2 | 2,409 | |||
Styrene | 2 | 1,971 | 2 | 1,971 | |||
p-Dichlorobenzene | 1 | 1,284 | 2 | 1,950 | |||
1,2-Dichloroethane | 1 | 842 | 1 | 842 | |||
Vinyl chloride | 1 | 502 | 1 | 502 | |||
Barium | 1 | 350 | 98 | 213,313 | |||
Selenium | 1 | 266 | 57 | 120,380 | |||
Di(2-ethylhexyl) phthalate | 1 | 25 | 3 | 173 | |||
Contaminants found in Iowa above legal limits
| Contaminant | # of Utilities | People Served | |
|---|---|---|---|
Radium, combined (-226 & -228) | 9 | 10,307 | |
Haloacetic acids (HAA5) | 3 | 5,963 | |
Total trihalomethanes (TTHMs) | 3 | 1,914 | |
Arsenic | 2 | 74 |