County annual report · FIPS 19123
2025 Mahaska County, IA Power Outage Report
In 2025, customers in Mahaska County, IA went without power for an average of 2.6 hours, a total of 22K customer-hours (Iowa average 2.9 hours). That ranks 55th worst of 99 Iowa counties and 2188th of 3,000 nationally.
Compared with IA, the US and 2024
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Mahaska County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 31, 2025 08:00 | May 31, 2025 13:00 | 5h | 2,221 | 6,556 |
| 2 | November 26, 2025 04:30 | November 26, 2025 17:45 | 13h 15m | 1,265 | 3,365 |
| 3 | March 30, 2025 18:45 | March 31, 2025 04:15 | 9h 30m | 1,055 | 1,332 |
| 4 | September 9, 2025 11:15 | September 9, 2025 13:30 | 2h 15m | 879 | 1,097 |
| 5 | December 18, 2025 19:15 | December 18, 2025 20:45 | 1h 30m | 398 | 498 |
| 6 | October 25, 2025 20:30 | October 26, 2025 01:15 | 4h 45m | 252 | 263 |
| 7 | May 15, 2025 18:00 | May 15, 2025 23:15 | 5h 15m | 181 | 322 |
| 8 | July 11, 2025 22:00 | July 12, 2025 02:30 | 4h 30m | 176 | 403 |
| 9 | March 15, 2025 13:30 | March 15, 2025 23:15 | 9h 45m | 175 | 74 |
| 10 | April 1, 2025 21:30 | April 2, 2025 05:15 | 7h 45m | 149 | 198 |
Outage episodes by size in 2025: 17 reached 100+ customers, 3 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Mahaska County reported on EIA Form 861 for 2025, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2024 | 5.5 hrs | 1.42 | 1.7 hrs | 0.94 |
| T I P Rural Electric Coop | 2018 | 2.5 hrs | 1.33 | 2.5 hrs | 1.33 |
| Interstate Power and Light Co | - | - | - | - | - |
| Pella Cooperative Elec Assn | - | - | - | - | - |
| City of Pella - (IA) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Iowa's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 8,162 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Mahaska County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mahaska County, IA annual power outage report, 2025, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/iowa/mahaska-county