County annual report · FIPS 19129
2021 Mills County, IA Power Outage Report
In 2021, customers in Mills County, IA went without power for an average of 12.5 hours, a total of 91K customer-hours (Iowa average 2.7 hours). That ranks 7th worst of 99 Iowa counties and 657th 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 Mills 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 15, 2021 19:15 | December 19, 2021 18:45 | 3d 23h | 5,353 | 68K |
| 2 | March 14, 2021 08:00 | March 14, 2021 20:00 | 12h | 2,054 | 5,993 |
| 3 | July 23, 2021 18:30 | July 23, 2021 22:00 | 3h 30m | 1,260 | 1,465 |
| 4 | February 21, 2021 15:45 | February 21, 2021 21:15 | 5h 30m | 1,060 | 2,574 |
| 5 | December 1, 2021 15:15 | December 1, 2021 16:15 | 1h | 625 | 625 |
| 6 | July 10, 2021 05:45 | July 11, 2021 18:00 | 1d 12h | 539 | 4,592 |
| 7 | June 11, 2021 14:45 | June 12, 2021 02:00 | 11h 15m | 474 | 383 |
| 8 | December 14, 2021 01:30 | December 14, 2021 08:45 | 7h 15m | 468 | 302 |
| 9 | May 5, 2021 17:45 | May 5, 2021 18:45 | 1h | 428 | 304 |
| 10 | April 13, 2021 19:45 | April 13, 2021 23:15 | 3h 30m | 382 | 687 |
Outage episodes by size in 2021: 18 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 Mills 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 |
| Southwest Iowa Rural Elec Coop | 2018 | 2.4 hrs | 1.69 | 1.6 hrs | 1.21 |
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 ÷ 7,270 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. Mills County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mills 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/mills-county