County annual report · FIPS 19121
2025 Madison County, IA Power Outage Report
In 2025, customers in Madison County, IA went without power for an average of 4.9 hours, a total of 46K customer-hours (Iowa average 2.9 hours). That ranks 28th worst of 99 Iowa counties and 1507th 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 Madison 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 5, 2025 04:45 | March 6, 2025 09:00 | 1d 4h | 1,839 | 24K |
| 2 | August 9, 2025 19:45 | August 9, 2025 22:00 | 2h 15m | 1,296 | 338 |
| 3 | December 10, 2025 08:00 | December 10, 2025 16:15 | 8h 15m | 1,046 | 3,959 |
| 4 | August 7, 2025 02:00 | August 7, 2025 07:15 | 5h 15m | 763 | 618 |
| 5 | November 26, 2025 15:00 | November 26, 2025 15:45 | 45m | 752 | 189 |
| 6 | May 7, 2025 07:15 | May 7, 2025 08:45 | 1h 30m | 750 | 1,125 |
| 7 | July 11, 2025 05:15 | July 11, 2025 18:45 | 13h 30m | 660 | 3,507 |
| 8 | July 30, 2025 08:30 | July 30, 2025 15:30 | 7h | 539 | 994 |
| 9 | January 24, 2025 19:15 | January 24, 2025 20:45 | 1h 30m | 501 | 751 |
| 10 | November 30, 2025 12:15 | November 30, 2025 18:00 | 5h 45m | 454 | 916 |
Outage episodes by size in 2025: 22 reached 100+ customers, 3 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 Madison 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 |
| Farmers Electric Coop, Inc - (IA) | 2018 | 5.9 hrs | 1.44 | 2.1 hrs | 1.26 |
| Interstate Power and Light Co | - | - | - | - | - |
| Waverly Municipal Elec Utility | - | - | - | - | - |
| Clarke Electric Coop Inc - (IA) | - | - | - | - | - |
| City of Winterset - (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 ÷ 9,366 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. Madison County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Madison 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/madison-county