County annual report · FIPS 55025
2020 Dane County, WI Power Outage Report
In 2020, customers in Dane County, WI went without power for an average of 0.4 hours, a total of 119K customer-hours (Wisconsin average 1.8 hours). That ranks 68th worst of 72 Wisconsin counties and 2848th of 3,019 nationally.
Compared with WI, the US and 2019
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Dane County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 11, 2020 07:45 | January 12, 2020 07:45 | 1d | 3,389 | 3,846 |
| 2 | August 27, 2020 18:15 | August 28, 2020 11:45 | 17h 30m | 2,963 | 12K |
| 3 | September 6, 2020 11:45 | September 7, 2020 16:30 | 1d 4h | 2,714 | 5,146 |
| 4 | April 1, 2020 14:45 | April 1, 2020 20:00 | 5h 15m | 2,384 | 1,552 |
| 5 | June 2, 2020 13:15 | June 3, 2020 22:45 | 1d 9h | 2,259 | 5,554 |
| 6 | July 9, 2020 16:15 | July 10, 2020 17:00 | 1d | 1,615 | 8,016 |
| 7 | April 9, 2020 16:15 | April 9, 2020 22:00 | 5h 45m | 1,575 | 2,496 |
| 8 | December 3, 2020 20:45 | December 4, 2020 11:00 | 14h 15m | 1,343 | 3,600 |
| 9 | July 8, 2020 10:15 | July 8, 2020 23:00 | 12h 45m | 1,322 | 1,214 |
| 10 | October 27, 2020 13:45 | October 27, 2020 21:00 | 7h 15m | 1,309 | 997 |
Outage episodes by size in 2020: 77 reached 100+ customers, 16 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 2020, 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 | 2020 | 2.3 hrs | 0.87 | 1.6 hrs | 0.70 |
| Adams-Columbia Electric Coop | 2020 | 2.6 hrs | 0.71 | 2.6 hrs | 0.71 |
| Rock Energy Cooperative | 2020 | 1.7 hrs | 0.68 | - | - |
| City of Stoughton - (WI) | 2020 | 61 min | 0.68 | 61 min | 0.68 |
| Madison Gas & Electric Co | 2020 | 27 min | 0.24 | 22 min | 0.22 |
| Sun Prairie Utilities | 2018 | 13 min | 0.32 | - | - |
| Village of Waunakee - (WI) | 2020 | 21 min | 0.11 | 21 min | 0.11 |
| 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 84% of Wisconsin's customers in 2020; 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, 2020, 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/2020/wisconsin/dane-county