County annual report · FIPS 55105
2023 Rock County, WI Power Outage Report
In 2023, customers in Rock County, WI went without power for an average of 2.1 hours, a total of 117K customer-hours (Wisconsin average 3.4 hours). That ranks 33rd worst of 72 Wisconsin counties and 2260th 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 Rock 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 | August 6, 2023 04:30 | August 6, 2023 07:00 | 2h 30m | 4,700 | 11K |
| 2 | July 28, 2023 06:30 | July 28, 2023 19:30 | 13h | 2,991 | 13K |
| 3 | November 14, 2023 14:00 | November 14, 2023 21:45 | 7h 45m | 2,396 | 1,243 |
| 4 | April 5, 2023 09:00 | April 5, 2023 21:00 | 12h | 2,233 | 1,736 |
| 5 | August 12, 2023 04:30 | August 12, 2023 15:00 | 10h 30m | 1,922 | 1,975 |
| 6 | November 15, 2023 15:30 | November 15, 2023 15:45 | 15m | 1,874 | 469 |
| 7 | April 1, 2023 00:15 | April 2, 2023 01:15 | 1d 1h | 1,687 | 8,744 |
| 8 | August 17, 2023 10:00 | August 17, 2023 16:45 | 6h 45m | 1,658 | 3,364 |
| 9 | February 22, 2023 23:15 | February 24, 2023 07:30 | 1d 8h | 1,638 | 9,586 |
| 10 | April 30, 2023 18:45 | May 1, 2023 01:30 | 6h 45m | 1,493 | 4,813 |
Outage episodes by size in 2023: 83 reached 100+ customers, 16 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 Rock 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 |
| Rock Energy Cooperative | 2023 | 40 min | 0.38 | 22 min | 0.22 |
| City of Stoughton - (WI) | 2023 | 90 min | 0.79 | 36 min | 0.54 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Brodhead Water & Lighting Comm | - | - | - | - | - |
| City of Evansville | - | - | - | - | - |
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 ÷ 56,401 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. Rock County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Rock 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/rock-county