Iowa Drinking Water Violations
1,795Water Systems
15,140Total Violations
1,317Health-Based
| County | Water Systems | Total Violations | Health-Based |
|---|---|---|---|
| Johnson | 125 | 1,161 | 112 |
| Lucas | 2 | 125 | 82 |
| Delaware | 28 | 229 | 77 |
| Dubuque | 74 | 753 | 68 |
| Palo Alto | 8 | 83 | 52 |
| Carroll | 13 | 164 | 49 |
| Cerro Gordo | 34 | 416 | 44 |
| Chickasaw | 21 | 216 | 42 |
| Iowa | 15 | 129 | 41 |
| Clayton | 45 | 612 | 38 |
| Louisa | 22 | 286 | 35 |
| Poweshiek | 8 | 60 | 34 |
| Winneshiek | 43 | 318 | 28 |
| Calhoun | 14 | 77 | 28 |
| Decatur | 4 | 72 | 28 |
| Jones | 36 | 759 | 27 |
| Mills | 16 | 221 | 27 |
| Linn | 83 | 1,175 | 25 |
| Pottawattamie | 32 | 329 | 24 |
| Jackson | 26 | 375 | 22 |
| Guthrie | 10 | 87 | 20 |
| Muscatine | 38 | 350 | 18 |
| Butler | 16 | 105 | 17 |
| Des Moines | 10 | 70 | 17 |
| Sac | 9 | 36 | 17 |
| Webster | 30 | 205 | 16 |
| Humboldt | 13 | 57 | 16 |
| Boone | 12 | 42 | 16 |
| Story | 21 | 216 | 15 |
| Benton | 24 | 267 | 14 |
| Washington | 24 | 251 | 13 |
| Woodbury | 32 | 63 | 13 |
| Lee | 7 | 44 | 13 |
| Clarke | 3 | 19 | 13 |
| Clinton | 28 | 271 | 12 |
| Cass | 14 | 162 | 12 |
| Polk | 37 | 142 | 11 |
| Scott | 77 | 419 | 10 |
| Wright | 22 | 158 | 10 |
| Bremer | 15 | 99 | 10 |
| Hardin | 20 | 203 | 9 |
| Mitchell | 16 | 88 | 9 |
| Pocahontas | 12 | 40 | 9 |
| Cedar | 28 | 243 | 8 |
| Allamakee | 32 | 220 | 8 |
| Kossuth | 27 | 112 | 8 |
| Hancock | 18 | 117 | 7 |
| Winnebago | 19 | 210 | 6 |
| Tama | 13 | 67 | 6 |
| Buchanan | 20 | 192 | 5 |
| Dallas | 22 | 114 | 5 |
| Sioux | 16 | 35 | 5 |
| Floyd | 18 | 112 | 4 |
| Fremont | 13 | 99 | 4 |
| Henry | 11 | 84 | 4 |
| Worth | 14 | 65 | 4 |
| Adams | 2 | 8 | 4 |
| Dubuque,jones | 1 | 4 | 4 |
| Fayette | 24 | 228 | 3 |
| Monona | 14 | 144 | 3 |
| Dickinson | 14 | 100 | 3 |
| Page | 9 | 29 | 3 |
| Taylor | 3 | 12 | 3 |
| Pottawattamie,shelby | 1 | 3 | 3 |
| Harrison | 20 | 202 | 2 |
| Black Hawk | 18 | 107 | 2 |
| Crawford | 10 | 48 | 2 |
| Cherokee | 12 | 39 | 2 |
| Audubon | 5 | 33 | 2 |
| Mahaska | 4 | 18 | 2 |
| Adair | 6 | 15 | 2 |
| Madison | 3 | 14 | 2 |
| Union | 1 | 8 | 2 |
| Howard | 20 | 199 | 1 |
| Franklin | 20 | 126 | 1 |
| Jasper | 11 | 77 | 1 |
| Emmet | 11 | 33 | 1 |
| Marion | 14 | 26 | 1 |
| Lyon | 12 | 18 | 1 |
| Appanoose,davis,decatur,jefferson,lucas,monroe,van Buren,wayne | 1 | 187 | 0 |
| Plymouth | 13 | 84 | 0 |
| Marshall | 12 | 70 | 0 |
| Jefferson | 8 | 63 | 0 |
| Shelby | 8 | 62 | 0 |
| Ringgold | 3 | 60 | 0 |
| Hamilton | 12 | 52 | 0 |
| O'brien | 7 | 48 | 0 |
| Greene | 5 | 47 | 0 |
| Van Buren | 7 | 45 | 0 |
| Keokuk | 11 | 44 | 0 |
| Wayne | 5 | 38 | 0 |
| Montgomery | 5 | 32 | 0 |
| Wapello | 5 | 29 | 0 |
| Warren | 11 | 27 | 0 |
| Buena Vista | 12 | 26 | 0 |
| Ida | 7 | 24 | 0 |
| Appanoose | 5 | 22 | 0 |
| Grundy | 8 | 18 | 0 |
| Howard,mitchell | 1 | 12 | 0 |
| Osceola | 7 | 11 | 0 |
| Davis | 2 | 8 | 0 |
| Boone,greene,hamilton,webster | 1 | 7 | 0 |
| Des Moines,henry | 1 | 4 | 0 |
| Clay | 5 | 2 | 0 |
| Madison,warren | 1 | 2 | 0 |
| Adair,adams,clarke,decatur,madison,ringgold,taylor,union | 1 | 1 | 0 |
| Black Hawk,bremer,butler,grundy,hardin,jasper,marshall,story | 1 | 0 | 0 |
| Buena Vista,clay | 1 | 0 | 0 |
| Dallas,polk | 1 | 0 | 0 |
| Jefferson,keokuk,wapello,washington | 1 | 0 | 0 |
| Monroe | 2 | 0 | 0 |