County annual report · FIPS 55105
2020 Rock County, WI Power Outage Report
In 2020, customers in Rock County, WI went without power for an average of 1.5 hours, a total of 84K customer-hours (Wisconsin average 1.8 hours). That ranks 41st worst of 72 Wisconsin counties and 2471st of 3,019 nationally.
Compared with WI, the US and 2019
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Rock County, 2020
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 29, 2020 18:45 | June 30, 2020 05:15 | 10h 30m | 3,542 | 10K |
| 2 | June 30, 2020 17:15 | June 30, 2020 20:15 | 3h | 3,511 | 1,766 |
| 3 | December 15, 2020 08:00 | December 15, 2020 08:30 | 30m | 1,849 | 925 |
| 4 | January 11, 2020 03:45 | January 12, 2020 17:30 | 1d 13h | 1,696 | 17K |
| 5 | November 10, 2020 21:15 | November 11, 2020 12:45 | 15h 30m | 1,315 | 3,853 |
| 6 | July 9, 2020 16:45 | July 11, 2020 04:45 | 1d 12h | 900 | 5,696 |
| 7 | January 1, 2020 11:15 | January 1, 2020 15:45 | 4h 30m | 892 | 1,970 |
| 8 | August 10, 2020 18:15 | August 11, 2020 04:30 | 10h 15m | 813 | 1,612 |
| 9 | May 11, 2020 13:15 | May 11, 2020 16:00 | 2h 45m | 751 | 906 |
| 10 | October 16, 2020 13:45 | October 16, 2020 20:15 | 6h 30m | 751 | 201 |
Outage episodes by size in 2020: 68 reached 100+ customers, 5 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 2020, 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 | 2020 | 2.3 hrs | 0.87 | 1.6 hrs | 0.70 |
| Rock Energy Cooperative | 2020 | 1.7 hrs | 0.68 | - | - |
| City of Stoughton - (WI) | 2020 | 61 min | 0.68 | 61 min | 0.68 |
| 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 84% of Wisconsin's customers in 2020; 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, 2020, 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/2020/wisconsin/rock-county