County annual report · FIPS 55045
2025 Green County, WI Power Outage Report
In 2025, customers in Green County, WI went without power for an average of 1.6 hours, a total of 21K customer-hours (Wisconsin average 3.9 hours). That ranks 51st worst of 72 Wisconsin counties and 2582nd 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 Green 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 21, 2025 22:30 | June 22, 2025 03:00 | 4h 30m | 1,920 | 3,483 |
| 2 | October 21, 2025 03:30 | October 21, 2025 05:00 | 1h 30m | 1,030 | 1,033 |
| 3 | July 11, 2025 23:30 | July 12, 2025 06:30 | 7h | 969 | 4,022 |
| 4 | June 4, 2025 13:45 | June 5, 2025 02:15 | 12h 30m | 611 | 652 |
| 5 | May 13, 2025 21:15 | May 13, 2025 21:45 | 30m | 552 | 139 |
| 6 | October 15, 2025 13:45 | October 15, 2025 21:45 | 8h | 464 | 1,029 |
| 7 | October 19, 2025 05:30 | October 19, 2025 07:30 | 2h | 463 | 921 |
| 8 | September 20, 2025 11:00 | September 20, 2025 14:15 | 3h 15m | 414 | 622 |
| 9 | May 11, 2025 11:45 | May 11, 2025 15:45 | 4h | 411 | 618 |
| 10 | January 29, 2025 15:45 | January 29, 2025 16:45 | 1h | 327 | 327 |
Outage episodes by size in 2025: 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 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 |
|---|---|---|---|---|---|
| Rock Energy Cooperative | 2024 | 53 min | 0.48 | 27 min | 0.36 |
| 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 n/a of Wisconsin's customers in 2025; 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, 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/green-county