County annual report · FIPS 55131
2023 Washington County, WI Power Outage Report
In 2023, customers in Washington County, WI went without power for an average of 6.5 hours, a total of 223K customer-hours (Wisconsin average 3.4 hours). That ranks 10th worst of 72 Wisconsin counties and 1211th 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 Washington 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 | July 29, 2023 04:30 | August 1, 2023 12:15 | 3d 7h | 10,109 | 93K |
| 2 | March 10, 2023 13:15 | March 10, 2023 20:00 | 6h 45m | 2,795 | 3,163 |
| 3 | July 26, 2023 04:15 | July 27, 2023 00:00 | 19h 45m | 2,667 | 21K |
| 4 | August 17, 2023 04:45 | August 17, 2023 20:00 | 15h 15m | 2,520 | 9,325 |
| 5 | September 11, 2023 15:30 | September 11, 2023 18:00 | 2h 30m | 2,403 | 4,898 |
| 6 | September 28, 2023 05:45 | September 28, 2023 19:45 | 14h | 2,403 | 4,271 |
| 7 | November 30, 2023 06:30 | November 30, 2023 10:00 | 3h 30m | 2,273 | 2,998 |
| 8 | May 8, 2023 22:30 | May 9, 2023 03:00 | 4h 30m | 1,979 | 2,244 |
| 9 | September 27, 2023 09:00 | September 27, 2023 18:45 | 9h 45m | 1,896 | 2,658 |
| 10 | April 4, 2023 03:45 | April 4, 2023 08:00 | 4h 15m | 1,849 | 767 |
Outage episodes by size in 2023: 57 reached 100+ customers, 19 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 Washington 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 |
| 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 2023; 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, 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/washington-county