County annual report · FIPS 19053
2021 Decatur County, IA Power Outage Report
In 2021, customers in Decatur County, IA went without power for an average of 2.6 hours, a total of 8,682 customer-hours (Iowa average 2.7 hours). That ranks 53rd worst of 99 Iowa counties and 2006th 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 Decatur 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 00:00 | December 17, 2021 11:45 | 1d 11h | 326 | 3,296 |
| 2 | August 9, 2021 14:45 | August 9, 2021 16:30 | 1h 45m | 274 | 367 |
| 3 | March 7, 2021 18:15 | March 7, 2021 21:00 | 2h 45m | 212 | 434 |
| 4 | March 11, 2021 00:45 | March 11, 2021 01:00 | 15m | 198 | 50 |
| 5 | April 26, 2021 10:15 | April 26, 2021 10:45 | 30m | 167 | 84 |
| 6 | July 27, 2021 21:15 | July 28, 2021 14:45 | 17h 30m | 132 | 311 |
| 7 | March 27, 2021 06:30 | March 27, 2021 09:30 | 3h | 128 | 221 |
| 8 | March 15, 2021 02:15 | March 15, 2021 15:15 | 13h | 76 | 179 |
| 9 | June 20, 2021 23:00 | June 21, 2021 14:30 | 15h 30m | 72 | 242 |
| 10 | October 29, 2021 11:30 | October 29, 2021 16:00 | 4h 30m | 61 | 54 |
Outage episodes by size in 2021: 7 reached 100+ customers, 0 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 Decatur 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 |
|---|---|---|---|---|---|
| Southwest Iowa Rural Elec Coop | 2018 | 2.4 hrs | 1.69 | 1.6 hrs | 1.21 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Grundy Electric Coop, Inc | - | - | - | - | - |
| Clarke Electric Coop Inc - (IA) | - | - | - | - | - |
| City of Lamoni - (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 ÷ 3,356 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. Decatur County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Decatur 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/decatur-county