County annual report · FIPS 55097
2018 Portage County, WI Power Outage Report
In 2018, customers in Portage County, WI went without power for an average of 1.5 hours, a total of 39K customer-hours (Wisconsin average 1.7 hours). That ranks 40th worst of 71 Wisconsin counties and 2108th 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 Portage 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 | September 20, 2018 16:30 | September 20, 2018 17:30 | 1h | 3,723 | 932 |
| 2 | October 4, 2018 02:45 | October 4, 2018 13:45 | 11h | 1,418 | 1,957 |
| 3 | March 29, 2018 21:45 | March 30, 2018 02:00 | 4h 15m | 1,259 | 946 |
| 4 | March 27, 2018 06:00 | March 27, 2018 08:45 | 2h 45m | 1,112 | 2,781 |
| 5 | January 12, 2018 03:30 | January 12, 2018 07:15 | 3h 45m | 1,041 | 3,642 |
| 6 | October 15, 2018 00:00 | October 15, 2018 01:45 | 1h 45m | 642 | 487 |
| 7 | April 14, 2018 05:15 | April 16, 2018 01:15 | 1d 20h | 626 | 4,351 |
| 8 | December 29, 2018 02:00 | December 29, 2018 03:45 | 1h 45m | 619 | 1,083 |
| 9 | September 25, 2018 22:15 | September 26, 2018 01:45 | 3h 30m | 528 | 994 |
| 10 | June 15, 2018 11:30 | June 15, 2018 23:00 | 11h 30m | 470 | 1,804 |
Outage episodes by size in 2018: 34 reached 100+ customers, 5 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 Portage 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 Public Service Corp | 2018 | 2.0 hrs | 0.97 | 1.8 hrs | 0.94 |
| Adams-Columbia Electric Coop | 2018 | 6.5 hrs | 0.91 | 50 min | 0.46 |
| Central Wisconsin Elec Coop | 2018 | 2.5 hrs | 1.27 | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Consolidated Water Power Co | - | - | - | - | - |
| Wisconsin Rapids W W & L 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 83% of Wisconsin's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 27,174 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. Portage County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Portage 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/portage-county