Iowa Power Outage History
99 counties tracked, 2014–2025. County-level reliability grades and outage frequency below.
Counties tracked
99
Avg national percentile
64th
Higher = more reliable
Grade F counties
6
County rankings (worst to best)
| County | Grade | National percentile |
|---|---|---|
| Marshall County | F | 6th |
| Tama County | F | 12th |
| Jasper County | F | 14th |
| Poweshiek County | F | 15th |
| Linn County | F | 16th |
| Benton County | F | 18th |
| Greene County | D | 20th |
| Monroe County | D | 21st |
| Cedar County | D | 22nd |
| Clinton County | D | 23rd |
| Iowa County | D | 27th |
| Boone County | D | 32nd |
| Wayne County | C | 41st |
| Ringgold County | C | 42nd |
| Adams County | C | 43rd |
| Louisa County | C | 44th |
| Jones County | C | 45th |
| Grundy County | C | 46th |
| Calhoun County | C | 47th |
| Washington County | C | 47th |
| Appanoose County | C | 48th |
| Hancock County | C | 48th |
| Mills County | C | 49th |
| Scott County | C | 50th |
| Keokuk County | C | 51st |
| Worth County | C | 51st |
| Van Buren County | C | 52nd |
| Hardin County | C | 52nd |
| Jefferson County | C | 52nd |
| Howard County | C | 54th |
| Story County | C | 54th |
| Winneshiek County | C | 57th |
| Sac County | C | 58th |
| Johnson County | C | 58th |
| Allamakee County | C | 58th |
| Webster County | C | 59th |
| Butler County | C | 59th |
| Guthrie County | C | 59th |
| Polk County | B | 60th |
| Fayette County | B | 61st |
| Franklin County | B | 61st |
| Lee County | B | 61st |
| Harrison County | B | 61st |
| Ida County | B | 62nd |
| Wright County | B | 62nd |
| Des Moines County | B | 63rd |
| Fremont County | B | 64th |
| Mitchell County | B | 67th |
| Pocahontas County | B | 68th |
| Henry County | B | 71st |
| Pottawattamie County | B | 72nd |
| Winnebago County | B | 72nd |
| Delaware County | B | 72nd |
| Monona County | B | 74th |
| Taylor County | B | 74th |
| Montgomery County | B | 74th |
| Humboldt County | B | 75th |
| Floyd County | B | 75th |
| Dallas County | B | 76th |
| Page County | B | 77th |
| Shelby County | B | 77th |
| Lyon County | B | 78th |
| Audubon County | B | 78th |
| Crawford County | B | 79th |
| Warren County | B | 79th |
| O'Brien County | B | 79th |
| Decatur County | B | 79th |
| Hamilton County | B | 80th |
| Cerro Gordo County | A | 80th |
| Clarke County | A | 80th |
| Clayton County | A | 80th |
| Madison County | A | 81st |
| Lucas County | A | 82nd |
| Davis County | A | 82nd |
| Wapello County | A | 83rd |
| Woodbury County | A | 83rd |
| Mahaska County | A | 84th |
| Buchanan County | A | 84th |
| Dickinson County | A | 85th |
| Chickasaw County | A | 85th |
| Kossuth County | A | 86th |
| Sioux County | A | 86th |
| Palo Alto County | A | 86th |
| Buena Vista County | A | 87th |
| Jackson County | A | 87th |
| Union County | A | 87th |
| Cherokee County | A | 87th |
| Plymouth County | A | 88th |
| Osceola County | A | 88th |
| Black Hawk County | A | 88th |
| Carroll County | A | 88th |
| Marion County | A | 89th |
| Cass County | A | 89th |
| Adair County | A | 90th |
| Dubuque County | A | 91st |
| Muscatine County | A | 92nd |
| Bremer County | A | 94th |
| Emmet County | A | 95th |
| Clay County | A | 97th |