County annual report · FIPS 55127
2023 Walworth County, WI Power Outage Report
In 2023, customers in Walworth County, WI went without power for an average of 13.4 hours, a total of 612K customer-hours (Wisconsin average 3.4 hours). That ranks 5th worst of 72 Wisconsin counties and 645th 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 Walworth 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 | February 22, 2023 22:15 | February 26, 2023 07:45 | 3d 9h | 15,076 | 277K |
| 2 | June 25, 2023 07:00 | June 26, 2023 22:00 | 1d 15h | 8,551 | 66K |
| 3 | April 1, 2023 01:15 | April 2, 2023 04:45 | 1d 3h | 7,945 | 36K |
| 4 | July 29, 2023 01:30 | August 1, 2023 04:15 | 3d 2h | 7,129 | 135K |
| 5 | September 7, 2023 10:00 | September 7, 2023 22:15 | 12h 15m | 4,819 | 5,777 |
| 6 | October 28, 2023 01:00 | October 28, 2023 03:15 | 2h 15m | 4,427 | 4,428 |
| 7 | May 31, 2023 23:00 | June 1, 2023 02:30 | 3h 30m | 3,518 | 6,159 |
| 8 | July 17, 2023 04:30 | July 17, 2023 13:00 | 8h 30m | 2,688 | 3,072 |
| 9 | July 12, 2023 19:30 | July 13, 2023 09:15 | 13h 45m | 2,437 | 9,278 |
| 10 | October 13, 2023 19:45 | October 13, 2023 22:30 | 2h 45m | 1,815 | 1,814 |
Outage episodes by size in 2023: 72 reached 100+ customers, 16 reached 1,000+ customers, 1 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 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 |
| 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 n/a of Wisconsin's customers in 2023; 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, 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/walworth-county