County annual report · FIPS 19017
2021 Bremer County, IA Power Outage Report
In 2021, customers in Bremer County, IA went without power for an average of 1.6 hours, a total of 26K customer-hours (Iowa average 2.7 hours). That ranks 74th worst of 99 Iowa counties and 2409th 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 Bremer 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 | August 24, 2021 19:15 | August 27, 2021 18:45 | 2d 23h | 1,615 | 13K |
| 2 | December 11, 2021 08:15 | December 11, 2021 18:45 | 10h 30m | 971 | 3,756 |
| 3 | December 16, 2021 01:30 | December 17, 2021 19:00 | 1d 17h | 575 | 3,607 |
| 4 | February 16, 2021 13:15 | February 16, 2021 15:30 | 2h 15m | 401 | 466 |
| 5 | July 14, 2021 22:45 | July 15, 2021 16:15 | 17h 30m | 278 | 791 |
| 6 | March 11, 2021 00:15 | March 11, 2021 03:00 | 2h 45m | 276 | 72 |
| 7 | October 29, 2021 00:15 | October 29, 2021 02:00 | 1h 45m | 123 | 214 |
| 8 | August 27, 2021 22:30 | August 27, 2021 23:45 | 1h 15m | 98 | 76 |
| 9 | September 11, 2021 05:00 | September 11, 2021 07:00 | 2h | 98 | 51 |
| 10 | June 9, 2021 12:30 | June 10, 2021 13:00 | 1d | 70 | 149 |
Outage episodes by size in 2021: 7 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 Bremer 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 |
| East-Central Iowa Rural Elec Coop | 2021 | 1.7 hrs | 1.30 | 88 min | 1.10 |
| Allamakee-Clayton El Coop, Inc | 2018 | 1.5 hrs | 0.73 | 1.5 hrs | 0.73 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Waverly Municipal Elec Utility | - | - | - | - | - |
| Butler County Rural Elec Coop - (IA) | - | - | - | - | - |
| City of Denver - (IA) | - | - | - | - | - |
| City of Readlyn - (IA) | - | - | - | - | - |
| City of Sumner - (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 ÷ 16,028 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. Bremer County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Bremer 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/bremer-county