County annual report · FIPS 55055
2017 Jefferson County, WI Power Outage Report
In 2017, customers in Jefferson County, WI went without power for an average of 2.9 hours, a total of 101K customer-hours (Wisconsin average 2.9 hours). That ranks 31st worst of 72 Wisconsin counties and 1355th of 2,786 nationally.
Compared with WI, the US and 2016
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Jefferson County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 14, 2017 19:00 | December 14, 2017 22:45 | 3h 45m | 5,253 | 7,228 |
| 2 | April 17, 2017 18:30 | April 17, 2017 19:45 | 1h 15m | 3,419 | 1,728 |
| 3 | June 28, 2017 20:15 | June 29, 2017 19:00 | 22h 45m | 3,351 | 11K |
| 4 | July 20, 2017 04:15 | July 20, 2017 14:15 | 10h | 2,387 | 8,694 |
| 5 | May 17, 2017 23:00 | May 19, 2017 01:15 | 1d 2h | 2,348 | 27K |
| 6 | July 12, 2017 06:30 | July 13, 2017 01:15 | 18h 45m | 1,602 | 5,857 |
| 7 | September 8, 2017 05:15 | September 8, 2017 05:30 | 15m | 1,394 | 349 |
| 8 | March 7, 2017 06:30 | March 7, 2017 19:00 | 12h 30m | 1,151 | 2,783 |
| 9 | April 15, 2017 03:30 | April 15, 2017 05:30 | 2h | 862 | 863 |
| 10 | June 17, 2017 06:15 | June 17, 2017 20:15 | 14h | 809 | 4,076 |
Outage episodes by size in 2017: 48 reached 100+ customers, 8 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 Jefferson County reported on EIA Form 861 for 2017, 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 | 2017 | 2.3 hrs | 0.75 | 57 min | 0.51 |
| Adams-Columbia Electric Coop | 2017 | 5.8 hrs | 1.20 | 2.4 hrs | 0.78 |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Jefferson Utilities | - | - | - | - | - |
| Lake Mills Light & Water | - | - | - | - | - |
| Waterloo Light & Water Comm | - | - | - | - | - |
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 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 34,512 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson County, WI annual power outage report, 2017, 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/2017/wisconsin/jefferson-county