County annual report · FIPS 19075
2024 Grundy County, IA Power Outage Report
In 2024, customers in Grundy County, IA went without power for an average of 5.6 hours, a total of 31K customer-hours (Iowa average 3.2 hours). That ranks 21st worst of 99 Iowa counties and 1482nd of 2,990 nationally.
Compared with IA, the US and 2023
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Grundy County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 14, 2024 06:30 | November 14, 2024 08:15 | 1h 45m | 650 | 1,138 |
| 2 | June 19, 2024 03:15 | June 20, 2024 15:00 | 1d 11h | 482 | 1,156 |
| 3 | May 24, 2024 11:15 | May 24, 2024 18:30 | 7h 15m | 355 | 752 |
| 4 | May 10, 2024 18:30 | May 16, 2024 20:45 | 6d 2h | 342 | 4,596 |
| 5 | April 10, 2024 15:00 | April 16, 2024 21:45 | 6d 6h | 309 | 1,510 |
| 6 | August 4, 2024 13:30 | August 4, 2024 15:30 | 2h | 293 | 575 |
| 7 | July 24, 2024 14:45 | July 24, 2024 16:45 | 2h | 286 | 572 |
| 8 | October 25, 2024 04:45 | October 25, 2024 05:45 | 1h | 239 | 239 |
| 9 | May 21, 2024 06:45 | May 22, 2024 16:45 | 1d 10h | 224 | 1,316 |
| 10 | March 7, 2024 01:45 | March 7, 2024 03:15 | 1h 30m | 155 | 217 |
Outage episodes by size in 2024: 16 reached 100+ customers, 0 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 2024, 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 n/a of Iowa's customers in 2024; 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, 2024, 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/2024/iowa/grundy-county