County annual report · FIPS 55043
2025 Grant County, WI Power Outage Report
In 2025, customers in Grant County, WI went without power for an average of 2.9 hours, a total of 22K customer-hours (Wisconsin average 3.9 hours). That ranks 32nd worst of 72 Wisconsin counties and 2089th 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 Grant 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 | August 10, 2025 08:45 | August 10, 2025 22:00 | 13h 15m | 1,885 | 7,112 |
| 2 | September 18, 2025 10:45 | September 18, 2025 18:30 | 7h 45m | 1,880 | 669 |
| 3 | April 18, 2025 11:15 | April 18, 2025 13:00 | 1h 45m | 1,867 | 539 |
| 4 | November 20, 2025 21:45 | November 21, 2025 02:00 | 4h 15m | 840 | 1,608 |
| 5 | April 5, 2025 00:30 | April 5, 2025 01:15 | 45m | 827 | 620 |
| 6 | July 11, 2025 20:00 | July 12, 2025 08:00 | 12h | 485 | 1,334 |
| 7 | March 19, 2025 23:00 | March 20, 2025 01:30 | 2h 30m | 394 | 690 |
| 8 | November 26, 2025 00:45 | November 26, 2025 03:00 | 2h 15m | 383 | 479 |
| 9 | November 26, 2025 10:15 | November 26, 2025 12:00 | 1h 45m | 383 | 670 |
| 10 | February 2, 2025 14:45 | February 2, 2025 16:45 | 2h | 371 | 694 |
Outage episodes by size in 2025: 20 reached 100+ customers, 3 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 Grant 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 |
|---|---|---|---|---|---|
| Wisconsin Electric Power Co | 2024 | 4.9 hrs | 1.04 | 1.8 hrs | 0.74 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Scenic Rivers Energy Coop | - | - | - | - | - |
| Village of Muscoda - (WI) | - | - | - | - | - |
| City of Cuba City | - | - | - | - | - |
| Village of Hazel Green - (WI) | - | - | - | - | - |
| City of Boscobel - (WI) | - | - | - | - | - |
| City of Fennimore - (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 ÷ 7,428 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. Grant County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Grant 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/grant-county