County annual report · FIPS 19123
2021 Mahaska County, IA Power Outage Report
In 2021, customers in Mahaska County, IA went without power for an average of 1.7 hours, a total of 14K customer-hours (Iowa average 2.7 hours). That ranks 70th worst of 99 Iowa counties and 2354th of 2,974 nationally.
Compared with IA, the US and 2020
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Mahaska County, 2021
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 27, 2021 18:15 | May 27, 2021 21:45 | 3h 30m | 2,450 | 1,577 |
| 2 | March 27, 2021 19:45 | March 27, 2021 21:45 | 2h | 799 | 1,307 |
| 3 | December 16, 2021 01:15 | December 17, 2021 23:00 | 1d 21h | 434 | 2,722 |
| 4 | October 1, 2021 17:00 | October 1, 2021 20:45 | 3h 45m | 205 | 336 |
| 5 | June 28, 2021 07:45 | June 28, 2021 12:00 | 4h 15m | 174 | 439 |
| 6 | June 25, 2021 00:15 | June 25, 2021 09:15 | 9h | 159 | 570 |
| 7 | August 27, 2021 03:00 | August 27, 2021 14:45 | 11h 45m | 133 | 688 |
| 8 | August 25, 2021 17:30 | August 26, 2021 03:00 | 9h 30m | 129 | 432 |
| 9 | January 21, 2021 11:45 | January 21, 2021 12:30 | 45m | 100 | 75 |
| 10 | October 11, 2021 10:30 | October 11, 2021 15:45 | 5h 15m | 91 | 47 |
Outage episodes by size in 2021: 9 reached 100+ customers, 1 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 2021, 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 | 2021 | 1.9 hrs | 1.04 | 75 min | 0.74 |
| 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 91% of Iowa's customers in 2021; 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, 2021, 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/2021/iowa/mahaska-county