County annual report · FIPS 55025
2025 Dane County, WI Power Outage Report
In 2025, customers in Dane County, WI went without power for an average of 1.4 hours, a total of 420K customer-hours (Wisconsin average 3.9 hours). That ranks 56th worst of 72 Wisconsin counties and 2641st of 3,000 nationally.
Compared with WI, the US and 2024
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Dane 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 | July 7, 2025 10:15 | September 18, 2025 04:30 | 72d 18h | 8,497 | 127K |
| 2 | March 20, 2025 23:30 | July 2, 2025 21:30 | 103d 22h | 4,661 | 68K |
| 3 | March 14, 2025 22:00 | March 17, 2025 16:30 | 2d 18h | 3,741 | 22K |
| 4 | October 12, 2025 22:15 | October 25, 2025 03:45 | 12d 5h | 2,398 | 52K |
| 5 | January 1, 2025 00:00 | March 14, 2025 19:15 | 72d 19h | 2,008 | 21K |
| 6 | July 5, 2025 23:30 | July 7, 2025 00:45 | 1d 1h | 1,621 | 2,279 |
| 7 | September 18, 2025 05:30 | September 19, 2025 23:45 | 1d 18h | 1,602 | 8,676 |
| 8 | September 21, 2025 07:00 | October 12, 2025 21:30 | 21d 14h | 1,390 | 71K |
| 9 | November 21, 2025 20:45 | December 19, 2025 18:15 | 27d 21h | 1,091 | 11K |
| 10 | March 17, 2025 17:30 | March 20, 2025 20:30 | 3d 3h | 1,004 | 4,967 |
Outage episodes by size in 2025: 29 reached 100+ customers, 10 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 Dane 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 |
|---|---|---|---|---|---|
| Wisconsin Electric Power Co | 2024 | 4.9 hrs | 1.04 | 1.8 hrs | 0.74 |
| Adams-Columbia Electric Coop | 2024 | 2.3 hrs | 1.15 | 2.3 hrs | 1.15 |
| Rock Energy Cooperative | 2024 | 53 min | 0.48 | 27 min | 0.36 |
| City of Stoughton - (WI) | 2024 | 56 min | 0.57 | 37 min | 0.44 |
| Madison Gas & Electric Co | 2024 | 4.6 hrs | 0.59 | 42 min | 0.34 |
| Sun Prairie Utilities | 2024 | 34 min | 1.01 | 34 min | 1.01 |
| Village of Waunakee - (WI) | 2024 | 40 min | 0.28 | 40 min | 0.28 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Village of Black Earth - (WI) | - | - | - | - | - |
| Village of Mazomanie - (WI) | - | - | - | - | - |
| Village of Mt. Horeb - (WI) | - | - | - | - | - |
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 Wisconsin's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 295,516 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. Dane County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dane County, WI 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/wisconsin/dane-county