County annual report · FIPS 19049
2025 Dallas County, IA Power Outage Report
In 2025, customers in Dallas County, IA went without power for an average of 2.4 hours, a total of 140K customer-hours (Iowa average 2.9 hours). That ranks 64th worst of 99 Iowa counties and 2270th 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 Dallas 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 | September 23, 2025 09:45 | September 23, 2025 10:45 | 1h | 6,037 | 5,474 |
| 2 | March 5, 2025 05:00 | March 6, 2025 20:15 | 1d 15h | 5,911 | 63K |
| 3 | September 8, 2025 14:00 | September 8, 2025 20:15 | 6h 15m | 2,687 | 2,278 |
| 4 | September 22, 2025 23:15 | September 23, 2025 02:00 | 2h 45m | 2,379 | 4,164 |
| 5 | July 23, 2025 14:45 | July 24, 2025 06:45 | 16h | 2,357 | 2,282 |
| 6 | June 4, 2025 10:30 | June 4, 2025 15:00 | 4h 30m | 2,287 | 2,291 |
| 7 | July 28, 2025 04:00 | July 29, 2025 00:45 | 20h 45m | 2,279 | 13K |
| 8 | November 26, 2025 02:00 | November 26, 2025 07:45 | 5h 45m | 1,815 | 2,995 |
| 9 | July 30, 2025 00:15 | July 30, 2025 21:15 | 21h | 1,705 | 5,523 |
| 10 | June 7, 2025 06:30 | June 7, 2025 15:15 | 8h 45m | 1,647 | 3,652 |
Outage episodes by size in 2025: 43 reached 100+ customers, 11 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 Dallas 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 |
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Midland Power Coop | - | - | - | - | - |
| Waverly Municipal Elec Utility | - | - | - | - | - |
| Guthrie County Rural E C A | - | - | - | - | - |
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 ÷ 58,451 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. Dallas County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dallas 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/dallas-county