County annual report · FIPS 55111
2025 Sauk County, WI Power Outage Report
In 2025, customers in Sauk County, WI went without power for an average of 0.9 hours, a total of 53K customer-hours (Wisconsin average 3.9 hours). That ranks 65th worst of 72 Wisconsin counties and 2795th 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 Sauk 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 | June 23, 2025 22:15 | June 25, 2025 12:45 | 1d 14h | 4,932 | 19K |
| 2 | October 6, 2025 15:45 | October 6, 2025 21:45 | 6h | 2,333 | 4,143 |
| 3 | August 24, 2025 22:15 | August 25, 2025 02:00 | 3h 45m | 972 | 2,829 |
| 4 | June 6, 2025 08:00 | June 6, 2025 13:15 | 5h 15m | 802 | 1,763 |
| 5 | June 3, 2025 22:45 | June 4, 2025 00:45 | 2h | 761 | 980 |
| 6 | June 21, 2025 15:45 | June 22, 2025 02:00 | 10h 15m | 682 | 1,091 |
| 7 | July 19, 2025 11:15 | July 19, 2025 12:00 | 45m | 643 | 482 |
| 8 | June 26, 2025 22:00 | June 27, 2025 00:00 | 2h | 627 | 941 |
| 9 | April 28, 2025 03:45 | April 28, 2025 05:30 | 1h 45m | 626 | 1,095 |
| 10 | July 6, 2025 19:30 | July 6, 2025 21:15 | 1h 45m | 594 | 743 |
Outage episodes by size in 2025: 37 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 Sauk 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 |
|---|---|---|---|---|---|
| Adams-Columbia Electric Coop | 2024 | 2.3 hrs | 1.15 | 2.3 hrs | 1.15 |
| Vernon Electric Coop | 2018 | 3.8 hrs | - | 2.4 hrs | - |
| Oakdale Electric Coop | 2024 | 2.5 hrs | 1.03 | 67 min | 0.69 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Richland Electric Coop | - | - | - | - | - |
| Wisconsin Dells Electric Util | - | - | - | - | - |
| Reedsburg Utility Comm | - | - | - | - | - |
| Village of Prairie Du Sac - (WI) | - | - | - | - | - |
| Village of Sauk City - (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 ÷ 60,955 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. Sauk County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sauk 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/sauk-county