County annual report · FIPS 55131
2018 Washington County, WI Power Outage Report
In 2018, customers in Washington County, WI went without power for an average of 4.9 hours, a total of 167K customer-hours (Wisconsin average 1.7 hours). That ranks 10th worst of 71 Wisconsin counties and 1071st 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 Washington 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 | August 8, 2018 21:45 | August 9, 2018 02:30 | 4h 45m | 8,505 | 9,119 |
| 2 | August 26, 2018 20:15 | August 28, 2018 21:00 | 2d | 4,153 | 33K |
| 3 | January 11, 2018 17:15 | January 11, 2018 20:15 | 3h | 4,106 | 5,229 |
| 4 | August 28, 2018 22:00 | September 1, 2018 00:30 | 3d 2h | 3,265 | 52K |
| 5 | April 28, 2018 04:15 | April 28, 2018 08:30 | 4h 15m | 2,141 | 1,894 |
| 6 | June 1, 2018 18:30 | June 1, 2018 18:45 | 15m | 1,763 | 441 |
| 7 | February 25, 2018 10:30 | February 25, 2018 13:15 | 2h 45m | 1,478 | 2,219 |
| 8 | December 12, 2018 14:15 | December 12, 2018 20:15 | 6h | 1,147 | 2,140 |
| 9 | August 21, 2018 03:15 | August 21, 2018 13:30 | 10h 15m | 1,117 | 4,049 |
| 10 | July 6, 2018 09:30 | July 6, 2018 11:15 | 1h 45m | 1,052 | 666 |
Outage episodes by size in 2018: 40 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 Washington 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 |
| 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 83% of Wisconsin's customers in 2018; 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, 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/washington-county