County annual report · FIPS 55131
2025 Washington County, WI Power Outage Report
In 2025, customers in Washington County, WI went without power for an average of 7.2 hours, a total of 246K customer-hours (Wisconsin average 3.9 hours). That ranks 14th worst of 72 Wisconsin counties and 1118th of 3,000 nationally.
Compared with WI, the US and 2024
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Washington County, 2025
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 9, 2025 20:00 | August 12, 2025 09:45 | 2d 13h | 5,821 | 72K |
| 2 | October 19, 2025 03:15 | October 19, 2025 11:00 | 7h 45m | 4,194 | 4,893 |
| 3 | February 6, 2025 20:45 | February 7, 2025 09:30 | 12h 45m | 3,929 | 6,112 |
| 4 | August 12, 2025 11:00 | August 14, 2025 08:15 | 1d 21h | 3,287 | 30K |
| 5 | October 20, 2025 19:15 | October 21, 2025 03:15 | 8h | 2,284 | 4,433 |
| 6 | December 29, 2025 06:15 | December 29, 2025 11:15 | 5h | 1,860 | 3,962 |
| 7 | January 21, 2025 10:30 | January 21, 2025 15:45 | 5h 15m | 1,837 | 3,000 |
| 8 | June 21, 2025 16:30 | June 23, 2025 08:15 | 1d 15h | 1,656 | 3,337 |
| 9 | April 28, 2025 21:00 | April 28, 2025 22:45 | 1h 45m | 1,625 | 2,000 |
| 10 | March 30, 2025 15:15 | March 31, 2025 02:15 | 11h | 1,590 | 4,429 |
Outage episodes by size in 2025: 60 reached 100+ customers, 18 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 Washington County reported on EIA Form 861 for 2025, 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 | 2024 | 4.9 hrs | 1.04 | 1.8 hrs | 0.74 |
| Hartford Electric | - | - | - | - | - |
| Slinger Utilities | - | - | - | - | - |
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 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 34,303 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. Washington County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Washington County, WI annual power outage report, 2025, 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/2025/wisconsin/washington-county