County annual report · FIPS 19075
2023 Grundy County, IA Power Outage Report
In 2023, customers in Grundy County, IA went without power for an average of 3.6 hours, a total of 20K customer-hours (Iowa average 2.0 hours). That ranks 19th worst of 99 Iowa counties and 1758th of 2,977 nationally.
Compared with IA, the US and 2022
Coverage line is EAGLE-I's share of Iowa customers tracked each year.
Biggest outages in Grundy County, 2023
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 31, 2023 21:45 | April 3, 2023 15:00 | 2d 17h | 1,671 | 5,630 |
| 2 | June 6, 2023 17:45 | June 7, 2023 16:45 | 23h | 863 | 1,293 |
| 3 | September 7, 2023 07:00 | September 7, 2023 09:00 | 2h | 655 | 1,266 |
| 4 | March 20, 2023 14:30 | March 21, 2023 01:15 | 10h 45m | 419 | 454 |
| 5 | June 24, 2023 16:00 | June 26, 2023 14:15 | 1d 22h | 355 | 182 |
| 6 | April 18, 2023 14:30 | April 18, 2023 17:30 | 3h | 239 | 334 |
| 7 | April 3, 2023 17:15 | April 6, 2023 20:30 | 3d 3h | 231 | 689 |
| 8 | February 15, 2023 03:15 | February 15, 2023 05:30 | 2h 15m | 173 | 305 |
| 9 | February 6, 2023 15:15 | February 6, 2023 18:00 | 2h 45m | 158 | 276 |
| 10 | March 14, 2023 13:30 | March 14, 2023 14:45 | 1h 15m | 156 | 40 |
Outage episodes by size in 2023: 13 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 Grundy County reported on EIA Form 861 for 2023, 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 2023; 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, 2023, 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/2023/iowa/grundy-county