County annual report · FIPS 55127
2020 Walworth County, WI Power Outage Report
In 2020, customers in Walworth County, WI went without power for an average of 4.7 hours, a total of 216K customer-hours (Wisconsin average 1.8 hours). That ranks 7th worst of 72 Wisconsin counties and 1448th 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 Walworth 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 | August 10, 2020 14:15 | August 12, 2020 15:15 | 2d 1h | 7,530 | 28K |
| 2 | November 10, 2020 22:15 | November 12, 2020 03:45 | 1d 5h | 7,292 | 81K |
| 3 | February 19, 2020 18:30 | February 19, 2020 20:45 | 2h 15m | 4,452 | 4,454 |
| 4 | July 9, 2020 21:45 | July 11, 2020 02:30 | 1d 4h | 3,244 | 21K |
| 5 | November 28, 2020 18:30 | November 28, 2020 22:00 | 3h 30m | 2,756 | 6,034 |
| 6 | June 18, 2020 13:30 | June 18, 2020 20:45 | 7h 15m | 2,329 | 2,856 |
| 7 | June 20, 2020 01:15 | June 20, 2020 01:30 | 15m | 2,328 | 582 |
| 8 | August 25, 2020 06:00 | August 25, 2020 22:15 | 16h 15m | 1,959 | 7,718 |
| 9 | September 2, 2020 22:15 | September 3, 2020 00:15 | 2h | 1,752 | 1,755 |
| 10 | September 15, 2020 05:15 | September 15, 2020 07:15 | 2h | 1,448 | 2,539 |
Outage episodes by size in 2020: 57 reached 100+ customers, 15 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 Walworth 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 | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| City of Elkhorn - (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 84% of Wisconsin's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 45,649 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. Walworth County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Walworth 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/walworth-county