County annual report · FIPS 55127
2015 Walworth County, WI Power Outage Report
In 2015, customers in Walworth County, WI went without power for an average of 2.5 hours, a total of 116K customer-hours (Wisconsin average 1.5 hours). That ranks 19th worst of 71 Wisconsin counties and 1050th of 2,484 nationally.
Compared with WI, the US
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Walworth County, 2015
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 2, 2015 22:00 | August 4, 2015 05:00 | 1d 7h | 4,277 | 36K |
| 2 | December 24, 2015 03:00 | December 25, 2015 00:00 | 21h | 3,481 | 11K |
| 3 | July 13, 2015 10:15 | July 14, 2015 18:00 | 1d 7h | 3,330 | 16K |
| 4 | January 3, 2015 20:30 | January 4, 2015 00:45 | 4h 15m | 2,220 | 1,669 |
| 5 | April 10, 2015 01:00 | April 10, 2015 12:45 | 11h 45m | 1,384 | 2,705 |
| 6 | November 17, 2015 10:15 | November 17, 2015 13:15 | 3h | 1,361 | 2,737 |
| 7 | September 17, 2015 20:30 | September 18, 2015 20:45 | 1d | 1,044 | 5,012 |
| 8 | October 12, 2015 19:45 | October 13, 2015 03:45 | 8h | 1,040 | 320 |
| 9 | July 18, 2015 17:30 | July 19, 2015 01:45 | 8h 15m | 1,003 | 2,640 |
| 10 | December 28, 2015 19:45 | December 29, 2015 10:00 | 14h 15m | 974 | 2,185 |
Outage episodes by size in 2015: 52 reached 100+ customers, 9 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 2015, 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 | 2015 | 2.1 hrs | 1.63 | 1.8 hrs | 1.38 |
| 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 n/a of Wisconsin's customers in 2015; 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, 2015, 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/2015/wisconsin/walworth-county