County annual report · FIPS 55105
2025 Rock County, WI Power Outage Report
In 2025, customers in Rock County, WI went without power for an average of 1.8 hours, a total of 103K customer-hours (Wisconsin average 3.9 hours). That ranks 45th worst of 72 Wisconsin counties and 2484th 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 Rock 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 | October 20, 2025 14:00 | October 20, 2025 18:30 | 4h 30m | 2,902 | 917 |
| 2 | August 16, 2025 18:45 | August 17, 2025 21:30 | 1d 2h | 2,553 | 14K |
| 3 | March 15, 2025 04:30 | March 18, 2025 13:30 | 3d 9h | 1,634 | 18K |
| 4 | June 4, 2025 01:45 | June 4, 2025 04:00 | 2h 15m | 1,634 | 575 |
| 5 | February 16, 2025 00:15 | February 16, 2025 03:30 | 3h 15m | 1,622 | 1,967 |
| 6 | July 29, 2025 13:00 | July 30, 2025 01:30 | 12h 30m | 1,460 | 1,344 |
| 7 | September 13, 2025 10:30 | September 13, 2025 14:00 | 3h 30m | 1,378 | 3,355 |
| 8 | March 29, 2025 16:30 | March 30, 2025 00:00 | 7h 30m | 1,340 | 876 |
| 9 | August 12, 2025 09:45 | August 12, 2025 22:00 | 12h 15m | 1,338 | 2,778 |
| 10 | July 11, 2025 19:30 | July 12, 2025 03:45 | 8h 15m | 1,114 | 1,422 |
Outage episodes by size in 2025: 71 reached 100+ customers, 14 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 Rock 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 |
| 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 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Brodhead Water & Lighting Comm | - | - | - | - | - |
| City of Evansville | - | - | - | - | - |
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 ÷ 56,401 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. Rock County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Rock 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/rock-county