County annual report · FIPS 55043
2021 Grant County, WI Power Outage Report
In 2021, customers in Grant County, WI went without power for an average of 2.0 hours, a total of 15K customer-hours (Wisconsin average 4.7 hours). That ranks 45th worst of 72 Wisconsin counties and 2234th 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 Grant 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 | May 7, 2021 13:45 | May 7, 2021 15:15 | 1h 30m | 1,873 | 1,560 |
| 2 | June 28, 2021 14:30 | June 28, 2021 16:15 | 1h 45m | 1,049 | 699 |
| 3 | July 29, 2021 06:30 | July 29, 2021 10:15 | 3h 45m | 429 | 1,012 |
| 4 | December 16, 2021 03:15 | December 18, 2021 03:45 | 2d | 410 | 4,978 |
| 5 | February 4, 2021 20:45 | February 4, 2021 21:15 | 30m | 374 | 187 |
| 6 | July 3, 2021 13:15 | July 3, 2021 14:15 | 1h | 360 | 360 |
| 7 | August 7, 2021 22:00 | August 8, 2021 08:45 | 10h 45m | 301 | 3,176 |
| 8 | December 11, 2021 03:15 | December 11, 2021 04:15 | 1h | 146 | 146 |
| 9 | October 23, 2021 05:30 | October 23, 2021 07:15 | 1h 45m | 70 | 40 |
| 10 | September 4, 2021 05:15 | September 4, 2021 06:30 | 1h 15m | 58 | 73 |
Outage episodes by size in 2021: 8 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 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 |
|---|---|---|---|---|---|
| Wisconsin Electric Power Co | 2021 | 7.0 hrs | 1.13 | 1.7 hrs | 0.73 |
| 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 85% of Wisconsin's customers in 2021; 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, 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/grant-county