County annual report · FIPS 55121
2018 Trempealeau County, WI Power Outage Report
In 2018, customers in Trempealeau County, WI went without power for an average of 0.5 hours, a total of 7,903 customer-hours (Wisconsin average 1.7 hours). That ranks 64th worst of 71 Wisconsin counties and 2487th 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 Trempealeau 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 | January 22, 2018 16:45 | January 22, 2018 21:00 | 4h 15m | 519 | 803 |
| 2 | June 12, 2018 06:45 | June 12, 2018 07:00 | 15m | 458 | 115 |
| 3 | July 26, 2018 02:30 | July 26, 2018 02:45 | 15m | 386 | 97 |
| 4 | February 17, 2018 13:45 | February 17, 2018 17:45 | 4h | 363 | 1,355 |
| 5 | June 16, 2018 07:45 | June 16, 2018 23:15 | 15h 30m | 309 | 1,554 |
| 6 | May 13, 2018 20:30 | May 13, 2018 23:00 | 2h 30m | 304 | 78 |
| 7 | July 13, 2018 03:15 | July 13, 2018 05:00 | 1h 45m | 87 | 131 |
| 8 | March 31, 2018 15:30 | April 1, 2018 01:30 | 10h | 86 | 763 |
| 9 | December 12, 2018 21:15 | December 12, 2018 23:00 | 1h 45m | 80 | 78 |
| 10 | August 28, 2018 00:15 | August 29, 2018 02:15 | 1d 2h | 73 | 582 |
Outage episodes by size in 2018: 6 reached 100+ customers, 0 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 Trempealeau 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 |
|---|---|---|---|---|---|
| Northern States Power Co | 2018 | 2.9 hrs | 0.94 | 1.8 hrs | 0.69 |
| Riverland Energy Cooperative | 2018 | 1.6 hrs | 0.74 | 1.6 hrs | 0.74 |
| Eau Claire Electric Coop | - | - | - | - | - |
| Jackson Electric Coop, Inc - (WI) | - | - | - | - | - |
| City of Arcadia - (WI) | - | - | - | - | - |
| Village of Trempealeau - (WI) | - | - | - | - | - |
| Whitehall Electric Utility | - | - | - | - | - |
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 ÷ 14,810 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. Trempealeau County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Trempealeau 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/trempealeau-county