County annual report · FIPS 19003
2021 Adams County, IA Power Outage Report
In 2021, customers in Adams County, IA went without power for an average of 7.9 hours, a total of 15K customer-hours (Iowa average 2.7 hours). That ranks 17th worst of 99 Iowa counties and 940th 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 Adams 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 23:15 | December 18, 2021 12:15 | 2d 13h | 584 | 2,374 |
| 2 | June 19, 2021 05:30 | June 21, 2021 16:45 | 2d 11h | 550 | 6,770 |
| 3 | October 15, 2021 19:15 | October 16, 2021 03:45 | 8h 30m | 272 | 560 |
| 4 | June 4, 2021 02:15 | June 4, 2021 03:30 | 1h 15m | 268 | 136 |
| 5 | April 17, 2021 14:15 | April 17, 2021 17:45 | 3h 30m | 232 | 620 |
| 6 | December 8, 2021 16:00 | December 8, 2021 22:00 | 6h | 189 | 892 |
| 7 | February 7, 2021 04:45 | February 9, 2021 14:00 | 2d 9h | 165 | 146 |
| 8 | October 26, 2021 15:30 | October 26, 2021 17:00 | 1h 30m | 165 | 248 |
| 9 | January 12, 2021 12:00 | January 12, 2021 14:00 | 2h | 84 | 155 |
| 10 | September 27, 2021 14:00 | September 27, 2021 21:45 | 7h 45m | 84 | 29 |
Outage episodes by size in 2021: 8 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 Adams 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 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| City of Corning - (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 ÷ 1,844 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. Adams County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Adams 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/adams-county