County annual report · FIPS 55045
2021 Green County, WI Power Outage Report
In 2021, customers in Green County, WI went without power for an average of 1.8 hours, a total of 24K customer-hours (Wisconsin average 4.7 hours). That ranks 48th worst of 72 Wisconsin counties and 2314th of 2,974 nationally.
Compared with WI, the US and 2020
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Green County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 8, 2021 03:30 | February 8, 2021 06:30 | 3h | 1,480 | 4,179 |
| 2 | August 21, 2021 11:45 | August 21, 2021 18:45 | 7h | 1,047 | 1,195 |
| 3 | December 16, 2021 03:30 | December 16, 2021 17:45 | 14h 15m | 977 | 4,698 |
| 4 | September 29, 2021 16:45 | September 29, 2021 21:15 | 4h 30m | 655 | 1,376 |
| 5 | October 25, 2021 01:30 | October 25, 2021 15:00 | 13h 30m | 427 | 888 |
| 6 | August 10, 2021 22:45 | August 11, 2021 06:45 | 8h | 407 | 1,755 |
| 7 | May 18, 2021 13:45 | May 18, 2021 14:45 | 1h | 404 | 404 |
| 8 | July 28, 2021 16:15 | July 28, 2021 18:15 | 2h | 400 | 789 |
| 9 | May 3, 2021 23:00 | May 4, 2021 05:30 | 6h 30m | 396 | 631 |
| 10 | December 5, 2021 18:45 | December 6, 2021 00:00 | 5h 15m | 366 | 732 |
Outage episodes by size in 2021: 20 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 Green County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| Rock Energy Cooperative | 2021 | 43 min | 0.47 | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Scenic Rivers Energy Coop | - | - | - | - | - |
| Brodhead Water & Lighting Comm | - | - | - | - | - |
| City of Evansville | - | - | - | - | - |
| Village of New Glarus - (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 85% of Wisconsin's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 13,290 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. Green County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Green County, WI annual power outage report, 2021, 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/2021/wisconsin/green-county