County annual report · FIPS 55043
2023 Grant County, WI Power Outage Report
In 2023, customers in Grant County, WI went without power for an average of 2.4 hours, a total of 18K customer-hours (Wisconsin average 3.4 hours). That ranks 28th worst of 72 Wisconsin counties and 2134th 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 Grant 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 26, 2023 12:00 | July 26, 2023 22:30 | 10h 30m | 1,640 | 6,672 |
| 2 | June 16, 2023 13:00 | June 16, 2023 19:45 | 6h 45m | 1,581 | 2,939 |
| 3 | July 23, 2023 01:45 | July 23, 2023 05:30 | 3h 45m | 821 | 263 |
| 4 | April 11, 2023 13:45 | April 11, 2023 14:45 | 1h | 728 | 728 |
| 5 | December 18, 2023 10:45 | December 18, 2023 13:15 | 2h 30m | 486 | 972 |
| 6 | May 3, 2023 15:15 | May 3, 2023 16:15 | 1h | 376 | 190 |
| 7 | December 17, 2023 07:15 | December 17, 2023 08:30 | 1h 15m | 295 | 369 |
| 8 | July 28, 2023 05:30 | July 28, 2023 08:45 | 3h 15m | 233 | 409 |
| 9 | October 1, 2023 22:45 | October 2, 2023 01:15 | 2h 30m | 232 | 298 |
| 10 | December 16, 2023 22:30 | December 17, 2023 00:45 | 2h 15m | 232 | 522 |
Outage episodes by size in 2023: 19 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 Grant 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 |
| 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 2023; 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, 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/grant-county