County annual report · FIPS 19165
2025 Shelby County, IA Power Outage Report
In 2025, customers in Shelby County, IA went without power for an average of 5.2 hours, a total of 37K customer-hours (Iowa average 2.9 hours). That ranks 27th worst of 99 Iowa counties and 1449th 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 Shelby 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 | March 19, 2025 08:45 | March 20, 2025 20:30 | 1d 11h | 2,018 | 22K |
| 2 | March 5, 2025 02:00 | March 5, 2025 20:45 | 18h 45m | 1,065 | 4,453 |
| 3 | October 14, 2025 17:00 | October 14, 2025 18:30 | 1h 30m | 421 | 353 |
| 4 | June 21, 2025 15:45 | June 23, 2025 13:30 | 1d 21h | 392 | 230 |
| 5 | April 9, 2025 00:30 | April 9, 2025 03:45 | 3h 15m | 391 | 1,125 |
| 6 | July 10, 2025 08:15 | July 10, 2025 16:45 | 8h 30m | 335 | 465 |
| 7 | July 24, 2025 04:45 | July 24, 2025 12:00 | 7h 15m | 293 | 338 |
| 8 | May 6, 2025 12:45 | May 12, 2025 12:15 | 5d 23h | 233 | 537 |
| 9 | July 6, 2025 06:00 | July 6, 2025 07:45 | 1h 45m | 231 | 404 |
| 10 | August 14, 2025 12:45 | August 14, 2025 20:30 | 7h 45m | 206 | 1,284 |
Outage episodes by size in 2025: 16 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 Shelby 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 |
|---|---|---|---|---|---|
| MidAmerican Energy Co | 2024 | 5.5 hrs | 1.42 | 1.7 hrs | 0.94 |
| Western Iowa Power Coop | 2018 | 47 min | 0.76 | 47 min | 0.76 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Nishnabotna Valley R E C | - | - | - | - | - |
| Harrison County Rrl Elec Coop | - | - | - | - | - |
| Atlantic Municipal Utilities | - | - | - | - | - |
| City of Shelby - (IA) | - | - | - | - | - |
| Harlan Municipal Utilities - (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 n/a of Iowa's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 7,164 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. Shelby County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Shelby 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/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/iowa/shelby-county