County annual report · FIPS 19075
2025 Grundy County, IA Power Outage Report
In 2025, customers in Grundy County, IA went without power for an average of 4.3 hours, a total of 24K customer-hours (Iowa average 2.9 hours). That ranks 34th worst of 99 Iowa counties and 1691st of 3,000 nationally.
Compared with IA, the US and 2024
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Grundy County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 19, 2025 19:00 | June 24, 2025 19:30 | 5d | 613 | 2,021 |
| 2 | July 19, 2025 10:30 | July 21, 2025 12:30 | 2d 2h | 455 | 9,105 |
| 3 | March 19, 2025 21:30 | March 20, 2025 17:45 | 20h 15m | 370 | 534 |
| 4 | September 22, 2025 15:00 | September 23, 2025 04:30 | 13h 30m | 366 | 801 |
| 5 | June 26, 2025 20:15 | June 27, 2025 12:15 | 16h | 295 | 1,140 |
| 6 | July 29, 2025 06:15 | July 29, 2025 22:00 | 15h 45m | 282 | 2,651 |
| 7 | March 4, 2025 20:45 | March 4, 2025 22:00 | 1h 15m | 214 | 267 |
| 8 | June 12, 2025 13:15 | June 16, 2025 13:30 | 4d | 173 | 271 |
| 9 | July 9, 2025 01:30 | July 9, 2025 13:15 | 11h 45m | 167 | 479 |
| 10 | May 28, 2025 14:00 | May 28, 2025 19:00 | 5h | 145 | 156 |
Outage episodes by size in 2025: 12 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 2025, 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 2025; 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, 2025, 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/2025/iowa/grundy-county