County annual report · FIPS 55025
2023 Dane County, WI Power Outage Report
In 2023, customers in Dane County, WI went without power for an average of 0.9 hours, a total of 266K customer-hours (Wisconsin average 3.4 hours). That ranks 62nd worst of 72 Wisconsin counties and 2706th of 2,977 nationally.
Compared with WI, the US and 2022
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Dane County, 2023
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 29, 2023 02:00 | August 1, 2023 00:00 | 2d 22h | 16,785 | 131K |
| 2 | April 17, 2023 02:30 | April 17, 2023 11:00 | 8h 30m | 4,516 | 11K |
| 3 | August 3, 2023 11:30 | August 4, 2023 03:45 | 16h 15m | 3,706 | 4,530 |
| 4 | April 16, 2023 06:45 | April 16, 2023 17:00 | 10h 15m | 2,453 | 10K |
| 5 | July 5, 2023 14:00 | July 6, 2023 05:15 | 15h 15m | 2,447 | 2,560 |
| 6 | January 28, 2023 03:30 | January 29, 2023 04:00 | 1d | 1,986 | 18K |
| 7 | June 21, 2023 12:15 | June 21, 2023 20:30 | 8h 15m | 1,906 | 2,479 |
| 8 | August 1, 2023 13:00 | August 1, 2023 21:15 | 8h 15m | 1,874 | 1,655 |
| 9 | July 8, 2023 01:30 | July 8, 2023 03:30 | 2h | 1,799 | 2,917 |
| 10 | July 7, 2023 12:15 | July 7, 2023 23:00 | 10h 45m | 1,626 | 1,978 |
Outage episodes by size in 2023: 103 reached 100+ customers, 15 reached 1,000+ customers, 1 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 2023, 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 | 2023 | 4.5 hrs | 1.04 | 85 min | 0.68 |
| Adams-Columbia Electric Coop | 2023 | 3.8 hrs | 1.09 | 3.8 hrs | 1.09 |
| Rock Energy Cooperative | 2023 | 40 min | 0.38 | 22 min | 0.22 |
| City of Stoughton - (WI) | 2023 | 90 min | 0.79 | 36 min | 0.54 |
| Madison Gas & Electric Co | 2023 | 64 min | 0.28 | 24 min | 0.17 |
| Sun Prairie Utilities | 2023 | 17 min | 0.44 | 17 min | 0.44 |
| Village of Waunakee - (WI) | 2023 | 1.7 hrs | 0.69 | 1.7 hrs | 0.69 |
| 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 2023; 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, 2023, 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/2023/wisconsin/dane-county