County annual report · FIPS 19033
2021 Cerro Gordo County, IA Power Outage Report
In 2021, customers in Cerro Gordo County, IA went without power for an average of 5.6 hours, a total of 165K customer-hours (Iowa average 2.7 hours). That ranks 27th worst of 99 Iowa counties and 1221st 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 Cerro Gordo 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 16, 2021 01:00 | December 21, 2021 03:15 | 5d 2h | 13,943 | 129K |
| 2 | August 27, 2021 20:30 | August 28, 2021 08:00 | 11h 30m | 7,327 | 11K |
| 3 | November 5, 2021 19:15 | November 5, 2021 22:45 | 3h 30m | 1,819 | 461 |
| 4 | August 28, 2021 08:45 | August 28, 2021 23:15 | 14h 30m | 1,801 | 4,190 |
| 5 | September 27, 2021 00:45 | September 27, 2021 02:30 | 1h 45m | 1,741 | 2,611 |
| 6 | August 24, 2021 17:30 | August 25, 2021 02:45 | 9h 15m | 1,245 | 1,764 |
| 7 | June 26, 2021 11:15 | June 26, 2021 18:15 | 7h | 1,066 | 356 |
| 8 | December 10, 2021 22:15 | December 11, 2021 01:15 | 3h | 1,012 | 2,724 |
| 9 | August 8, 2021 10:15 | August 8, 2021 15:00 | 4h 45m | 554 | 834 |
| 10 | June 21, 2021 12:45 | June 21, 2021 19:30 | 6h 45m | 375 | 358 |
Outage episodes by size in 2021: 23 reached 100+ customers, 8 reached 1,000+ customers, 1 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 Cerro Gordo 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 |
| Heartland Power Coop | 2021 | 3.2 hrs | 0.80 | 35 min | 0.39 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Prairie Energy Coop | - | - | - | - | - |
| Butler County Rural Elec Coop - (IA) | - | - | - | - | - |
| Franklin Rural Electric Coop - (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 ÷ 29,435 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. Cerro Gordo County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cerro Gordo 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/cerro-gordo-county