County annual report · FIPS 19169
2021 Story County, IA Power Outage Report
In 2021, customers in Story County, IA went without power for an average of 1.0 hours, a total of 66K customer-hours (Iowa average 2.7 hours). That ranks 87th worst of 99 Iowa counties and 2644th 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 Story 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 | September 30, 2021 09:15 | September 30, 2021 23:00 | 13h 45m | 3,778 | 4,021 |
| 2 | October 24, 2021 23:30 | October 25, 2021 21:00 | 21h 30m | 3,098 | 12K |
| 3 | February 16, 2021 09:15 | February 16, 2021 14:30 | 5h 15m | 2,759 | 4,626 |
| 4 | June 30, 2021 15:45 | June 30, 2021 18:30 | 2h 45m | 2,019 | 2,083 |
| 5 | September 7, 2021 13:15 | September 7, 2021 13:30 | 15m | 1,902 | 476 |
| 6 | September 6, 2021 12:45 | September 6, 2021 15:15 | 2h 30m | 1,900 | 4,282 |
| 7 | August 29, 2021 12:45 | August 29, 2021 15:45 | 3h | 1,846 | 1,165 |
| 8 | April 22, 2021 18:15 | April 22, 2021 20:00 | 1h 45m | 1,452 | 2,178 |
| 9 | December 16, 2021 00:15 | December 17, 2021 14:45 | 1d 14h | 1,445 | 4,541 |
| 10 | June 23, 2021 01:00 | June 23, 2021 02:00 | 1h | 1,322 | 1,322 |
Outage episodes by size in 2021: 37 reached 100+ customers, 11 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 Story 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 |
|---|---|---|---|---|---|
| Consumers Energy Coop - (IA) | 2021 | 1.8 hrs | 1.39 | 1.8 hrs | 1.39 |
| City of Ames - (IA) | 2021 | 37 min | 0.60 | 37 min | 0.60 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Midland Power Coop | - | - | - | - | - |
| City of Story City - (IA) | - | - | - | - | - |
| City of State Center - (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 ÷ 63,396 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. Story County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Story 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/story-county