County annual report · FIPS 19015
2021 Boone County, IA Power Outage Report
In 2021, customers in Boone County, IA went without power for an average of 6.0 hours, a total of 64K customer-hours (Iowa average 2.7 hours). That ranks 23rd worst of 99 Iowa counties and 1145th 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 Boone 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 23:45 | December 19, 2021 01:30 | 3d 1h | 2,644 | 50K |
| 2 | April 29, 2021 17:00 | April 29, 2021 17:15 | 15m | 782 | 196 |
| 3 | June 14, 2021 20:30 | June 14, 2021 23:45 | 3h 15m | 525 | 578 |
| 4 | July 9, 2021 18:15 | July 10, 2021 03:00 | 8h 45m | 517 | 895 |
| 5 | December 20, 2021 15:00 | December 20, 2021 22:00 | 7h | 421 | 233 |
| 6 | May 6, 2021 13:45 | May 6, 2021 16:45 | 3h | 387 | 544 |
| 7 | October 21, 2021 23:00 | October 22, 2021 05:00 | 6h | 370 | 449 |
| 8 | February 16, 2021 09:15 | February 16, 2021 11:45 | 2h 30m | 308 | 357 |
| 9 | October 28, 2021 03:45 | October 28, 2021 04:45 | 1h | 279 | 279 |
| 10 | May 27, 2021 11:00 | May 27, 2021 14:15 | 3h 15m | 278 | 353 |
Outage episodes by size in 2021: 28 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 Boone 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 |
|---|---|---|---|---|---|
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Midland Power Coop | - | - | - | - | - |
| City of Story City - (IA) | - | - | - | - | - |
| City of Ogden - (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 ÷ 10,670 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. Boone County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Boone 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/). https://massoutage.com/reports/2021/iowa/boone-county