County annual report · FIPS 55127
2018 Walworth County, WI Power Outage Report
In 2018, customers in Walworth County, WI went without power for an average of 2.1 hours, a total of 97K customer-hours (Wisconsin average 1.7 hours). That ranks 26th worst of 71 Wisconsin counties and 1815th of 2,798 nationally.
Compared with WI, the US and 2017
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Walworth County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 3, 2018 17:00 | October 3, 2018 22:30 | 5h 30m | 5,369 | 5,772 |
| 2 | March 26, 2018 09:00 | March 26, 2018 12:15 | 3h 15m | 2,846 | 3,619 |
| 3 | October 11, 2018 14:15 | October 11, 2018 19:30 | 5h 15m | 2,713 | 693 |
| 4 | November 28, 2018 16:45 | November 28, 2018 17:00 | 15m | 2,675 | 669 |
| 5 | August 26, 2018 23:15 | August 27, 2018 20:45 | 21h 30m | 2,466 | 9,525 |
| 6 | November 11, 2018 07:30 | November 11, 2018 13:15 | 5h 45m | 2,002 | 1,573 |
| 7 | August 6, 2018 03:15 | August 6, 2018 21:30 | 18h 15m | 1,777 | 5,782 |
| 8 | March 12, 2018 15:15 | March 12, 2018 16:15 | 1h | 1,767 | 886 |
| 9 | April 18, 2018 21:00 | April 19, 2018 02:15 | 5h 15m | 1,070 | 826 |
| 10 | July 1, 2018 12:00 | July 2, 2018 04:30 | 16h 30m | 1,063 | 2,733 |
Outage episodes by size in 2018: 65 reached 100+ customers, 11 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 2018, 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 | 2018 | 2.0 hrs | 0.73 | 70 min | 0.59 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Rock Energy Cooperative | - | - | - | - | - |
| 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 83% of Wisconsin's customers in 2018; 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, 2018, 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/2018/wisconsin/walworth-county