– 0 customers out in Iowa
Power outage history
Iowa
5.4hours
without power for the average customer in a typical year, 2018–2025. 25th of 51.
Electricity customers 1,639,021 Across 99 counties
Worst well-recorded year 2020 27 hours without power, average customer
County by county
Where Iowa goes dark
Hours without power for the average customer in a typical year. Hover a county; click to open it.
Fewer hours64+ h / yr
Year by year
Hours in the dark, statewide
The record
Iowa's largest outages
Statewide events with at least 2% of customers, or 25,000, out at once, by peak.
| Began | Storm | Peak out | Share |
|---|---|---|---|
| Aug 10, 2020 | Thunderstorms | 487,454 | 29.7% |
| Dec 15, 2021 | Tornadoes | 146,396 | 8.9% |
| May 21, 2024 | Thunderstorms | 69,005 | 4.2% |
| Jul 15, 2024 | Thunderstorms | 61,280 | 3.7% |
| May 24, 2024 | Thunderstorms | 55,439 | 3.4% |
| Mar 31, 2023 | Tornadoes | 47,462 | 2.9% |
| Mar 5, 2025 | Winter storm | 44,332 | 2.7% |
| Jul 19, 2017 | Thunderstorms | 38,362 | 2.3% |
| Jul 28, 2025 | Thunderstorms | 37,391 | 2.3% |
| Jul 29, 2025 | Thunderstorms | 37,317 | 2.3% |
| Jul 28, 2023 | Thunderstorms | 36,232 | 2.2% |
| Mar 6, 2017 | Thunderstorms | 34,698 | 2.1% |
| May 17, 2017 | Thunderstorms | 34,017 | 2.1% |
| Mar 19, 2025 | Winter storm | 33,144 | 2.0% |
Every county
All 99 counties
| County | Hours / yr | Major outages since 2018 | Customers |
|---|---|---|---|
| Marshall | 24 | 18 | 15,945 |
| Poweshiek | 21 | 26 | 6,708 |
| Linn | 18 | 3 | 118,247 |
| Jasper | 18 | 25 | 15,566 |
| Tama | 17 | 19 | 8,169 |
| Clinton | 13 | 22 | 21,505 |
| Cedar | 13 | 15 | 8,986 |
| Benton | 13 | 3 | 13,498 |
| Monroe | 12 | 40 | 4,056 |
| Worth | 12 | 35 | 2,289 |
| Greene | 12 | 21 | 3,417 |
| Iowa | 9.7 | 53 | 6,965 |
| Scott | 9.2 | 8 | 67,611 |
| Boone | 8.7 | 15 | 10,670 |
| Adams | 8.6 | 68 | 1,844 |
| Jones | 7.3 | 9 | 8,507 |
| Calhoun | 6.8 | 38 | 4,092 |
| Ringgold | 6.8 | 33 | 2,511 |
| Keokuk | 6.4 | 33 | 4,684 |
| Osceola | 6.3 | 3 | 3,588 |
| Butler | 6.2 | 31 | 4,791 |
| Grundy | 6.0 | 17 | 5,507 |
| Franklin | 6.0 | 34 | 4,637 |
| Wayne | 5.8 | 37 | 2,947 |
| Howard | 5.7 | 35 | 4,177 |
| Johnson | 5.5 | 6 | 77,769 |
| Appanoose | 5.5 | 22 | 6,572 |
| Hancock | 5.5 | 23 | 5,489 |
| Wright | 5.4 | 27 | 5,538 |
| Washington | 5.3 | 25 | 9,700 |
| Van Buren | 5.2 | 32 | 3,146 |
| Louisa | 5.2 | 26 | 4,554 |
| Sac | 5.2 | 43 | 3,895 |
| Mills | 4.8 | 27 | 7,270 |
| Fremont | 4.8 | 25 | 4,285 |
| Story | 4.7 | 5 | 63,396 |
| Hardin | 4.6 | 25 | 6,885 |
| Winnebago | 4.5 | 14 | 7,213 |
| Lee | 4.4 | 21 | 15,486 |
| Harrison | 4.4 | 15 | 7,620 |
| Guthrie | 4.2 | 13 | 5,390 |
| Taylor | 4.1 | 13 | 2,951 |
| Jefferson | 4.0 | 43 | 6,879 |
| Audubon | 4.0 | 25 | 2,511 |
| Fayette | 4.0 | 21 | 8,712 |
| Polk | 3.9 | 1 | 287,095 |
| Mitchell | 3.8 | 8 | 6,347 |
| Allamakee | 3.6 | 25 | 6,750 |
| Delaware | 3.6 | 27 | 7,035 |
| Monona | 3.6 | 7 | 7,388 |
| Des Moines | 3.6 | 22 | 18,207 |
| Ida | 3.6 | 29 | 3,231 |
| Winneshiek | 3.5 | 12 | 9,369 |
| Floyd | 3.5 | 35 | 7,886 |
| Humboldt | 3.3 | 29 | 3,507 |
| Pottawattamie | 3.0 | 9 | 51,132 |
| Page | 3.0 | 12 | 9,035 |
| O'Brien | 2.9 | 35 | 5,030 |
| Mahaska | 2.9 | 33 | 8,162 |
| Shelby | 2.9 | 8 | 7,164 |
| Dickinson | 2.8 | 23 | 6,731 |
| Pocahontas | 2.8 | 24 | 3,159 |
| Decatur | 2.7 | 24 | 3,356 |
| Webster | 2.6 | 9 | 20,411 |
| Warren | 2.5 | 9 | 23,806 |
| Dallas | 2.5 | 4 | 58,451 |
| Jackson | 2.5 | 4 | 10,302 |
| Montgomery | 2.5 | 9 | 5,724 |
| Hamilton | 2.4 | 11 | 9,205 |
| Lyon | 2.4 | 14 | 5,090 |
| Cerro Gordo | 2.3 | 7 | 29,435 |
| Chickasaw | 2.2 | 8 | 6,991 |
| Cherokee | 2.1 | 16 | 5,968 |
| Wapello | 2.1 | 14 | 21,960 |
| Crawford | 2.1 | 9 | 9,213 |
| Madison | 2.1 | 6 | 9,366 |
| Buchanan | 2.1 | 3 | 12,254 |
| Palo Alto | 2.0 | 22 | 4,166 |
| Union | 2.0 | 14 | 6,645 |
| Plymouth | 2.0 | 5 | 8,581 |
| Buena Vista | 2.0 | 5 | 11,607 |
| Henry | 1.9 | 3 | 11,923 |
| Sioux | 1.9 | 7 | 16,993 |
| Clarke | 1.9 | 10 | 4,290 |
| Lucas | 1.8 | 7 | 4,225 |
| Davis | 1.6 | 3 | 4,718 |
| Woodbury | 1.6 | 3 | 50,197 |
| Carroll | 1.6 | 7 | 8,666 |
| Clayton | 1.6 | 7 | 10,421 |
| Kossuth | 1.6 | 8 | 7,698 |
| Marion | 1.5 | 10 | 19,876 |
| Black Hawk | 1.5 | 5 | 57,533 |
| Adair | 1.4 | 12 | 3,686 |
| Dubuque | 1.4 | 3 | 46,546 |
| Muscatine | 1.3 | 1 | 30,353 |
| Cass | 1.3 | 2 | 10,329 |
| Bremer | 0.9 | 2 | 16,028 |
| Emmet | 0.6 | 3 | 5,934 |
| Clay | 0.5 | 0 | 13,668 |
Who keeps the lights on
Utilities in Iowa
Reliability and residential price as reported to the EIA for the latest year. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | ¢/kWh | Customers |
|---|---|---|---|---|---|
| MidAmerican Energy Co | Investor Owned | 205 | 82 | 11.2 | 640k |
| Interstate Power and Light Co | Investor Owned | 89 | 74 | 17.8 | 419k |
| Corridor Energy Cooperative | Cooperative | 135 | 135 | 14.2 | 31k |
| City of Ames | Municipal | 21 | 21 | 12.1 | 25k |
| Eastern Iowa Light & Power Coop | Cooperative | 92 | 79 | 14.8 | 20k |
| Cedar Falls Utilities | Municipal | 37 | – | 11.6 | 18k |
| Midland Power Coop | Cooperative | 488 | 91 | 13.7 | 12k |
| Maquoketa Valley Rrl Elec Coop | Cooperative | 138 | 63 | 13.8 | 11k |
| Board of Water Electric & Communications | Municipal | 19 | 11 | 12.9 | 10k |
| Iowa Lakes Electric Coop | Cooperative | 55 | 54 | 13.8 | 9.8k |
| North West Rural Electric Coop | Cooperative | 188 | 115 | 9.4 | 9.5k |
| Access Energy Coop | Cooperative | 83 | 83 | 14.8 | 8.9k |
| East-Central Iowa Rural Elec Coop | Cooperative | 67 | 67 | 13.1 | 7.4k |
| Consumers Energy Coop | Cooperative | 94 | 94 | 14.8 | 7.1k |
| MiEnergy Cooperative | Cooperative | 102 | 86 | 17.2 | 6.0k |
| Heartland Power Coop | Cooperative | 117 | 67 | 12.8 | 4.4k |
| Butler County Rural Elec Coop | Cooperative | 97 | 85 | 14.5 | 3.9k |
| Prairie Energy Coop | Cooperative | 428 | 121 | 14.1 | 3.4k |
| City of Maquoketa | Municipal | – | – | 13.6 | 2.8k |
| City of Independence | Municipal | 17 | 4 | 14.4 | 2.7k |