County annual report · FIPS 19157
2021 Poweshiek County, IA Power Outage Report
In 2021, customers in Poweshiek County, IA went without power for an average of 5.4 hours, a total of 36K customer-hours (Iowa average 2.7 hours). That ranks 30th worst of 99 Iowa counties and 1253rd 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 Poweshiek 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 | December 16, 2021 01:30 | December 17, 2021 06:30 | 1d 5h | 2,518 | 9,450 |
| 2 | March 31, 2021 14:00 | March 31, 2021 17:15 | 3h 15m | 1,843 | 938 |
| 3 | August 8, 2021 06:15 | August 9, 2021 12:30 | 1d 6h | 1,338 | 2,332 |
| 4 | August 27, 2021 01:30 | August 27, 2021 09:45 | 8h 15m | 1,174 | 6,271 |
| 5 | March 11, 2021 02:30 | March 11, 2021 04:45 | 2h 15m | 764 | 1,719 |
| 6 | March 23, 2021 18:45 | March 24, 2021 00:30 | 5h 45m | 632 | 1,338 |
| 7 | May 3, 2021 23:00 | May 4, 2021 00:30 | 1h 30m | 588 | 696 |
| 8 | March 24, 2021 19:30 | March 24, 2021 21:45 | 2h 15m | 473 | 240 |
| 9 | August 12, 2021 08:45 | August 13, 2021 16:15 | 1d 7h | 466 | 2,502 |
| 10 | December 11, 2021 12:45 | December 11, 2021 15:30 | 2h 45m | 408 | 1,122 |
Outage episodes by size in 2021: 28 reached 100+ customers, 4 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 Poweshiek 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 | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Pella Cooperative Elec Assn | - | - | - | - | - |
| City of Brooklyn - (IA) | - | - | - | - | - |
| City of Montezuma - (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 ÷ 6,708 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. Poweshiek County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Poweshiek 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/poweshiek-county