County annual report · FIPS 19075
2021 Grundy County, IA Power Outage Report
In 2021, customers in Grundy County, IA went without power for an average of 3.8 hours, a total of 21K customer-hours (Iowa average 2.7 hours). That ranks 38th worst of 99 Iowa counties and 1580th 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 Grundy 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 | March 29, 2021 23:45 | April 6, 2021 17:45 | 7d 18h | 1,846 | 4,330 |
| 2 | December 16, 2021 01:00 | December 17, 2021 00:15 | 23h 15m | 1,205 | 4,290 |
| 3 | March 16, 2021 00:15 | March 16, 2021 22:15 | 22h | 823 | 4,950 |
| 4 | February 16, 2021 13:30 | February 16, 2021 15:30 | 2h | 527 | 433 |
| 5 | December 11, 2021 05:30 | December 11, 2021 16:45 | 11h 15m | 348 | 2,055 |
| 6 | June 19, 2021 11:00 | June 19, 2021 15:00 | 4h | 313 | 1,020 |
| 7 | November 8, 2021 20:45 | November 8, 2021 21:15 | 30m | 310 | 155 |
| 8 | September 7, 2021 13:00 | September 7, 2021 14:45 | 1h 45m | 275 | 481 |
| 9 | January 6, 2021 15:15 | January 6, 2021 15:30 | 15m | 249 | 62 |
| 10 | December 14, 2021 09:00 | December 14, 2021 12:00 | 3h | 209 | 627 |
Outage episodes by size in 2021: 12 reached 100+ customers, 2 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 Grundy 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 | - | - | - | - | - |
| Grundy County Rural Elec Coop | - | - | - | - | - |
| Cedar Falls Utilities | - | - | - | - | - |
| City of Dike | - | - | - | - | - |
| Grundy Center Mun Light & Power | - | - | - | - | - |
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 ÷ 5,507 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. Grundy County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Grundy 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/grundy-county