County annual report · FIPS 55097
2020 Portage County, WI Power Outage Report
In 2020, customers in Portage County, WI went without power for an average of 1.8 hours, a total of 49K customer-hours (Wisconsin average 1.8 hours). That ranks 31st worst of 72 Wisconsin counties and 2331st of 3,019 nationally.
Compared with WI, the US and 2019
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Portage County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 3, 2020 19:45 | May 3, 2020 22:15 | 2h 30m | 3,877 | 3,885 |
| 2 | February 3, 2020 14:45 | February 3, 2020 16:30 | 1h 45m | 3,736 | 936 |
| 3 | September 2, 2020 04:00 | September 2, 2020 11:00 | 7h | 3,346 | 11K |
| 4 | May 10, 2020 16:30 | May 10, 2020 18:30 | 2h | 1,881 | 1,649 |
| 5 | March 12, 2020 17:00 | March 12, 2020 17:45 | 45m | 1,639 | 829 |
| 6 | March 9, 2020 19:00 | March 9, 2020 19:45 | 45m | 1,247 | 822 |
| 7 | December 27, 2020 06:30 | December 27, 2020 08:45 | 2h 15m | 882 | 1,970 |
| 8 | August 28, 2020 15:45 | August 28, 2020 19:30 | 3h 45m | 752 | 2,069 |
| 9 | November 24, 2020 20:30 | November 24, 2020 23:30 | 3h | 752 | 2,256 |
| 10 | November 10, 2020 07:15 | November 10, 2020 09:00 | 1h 45m | 740 | 1,111 |
Outage episodes by size in 2020: 40 reached 100+ customers, 6 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 2020, 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 | 2020 | 1.7 hrs | 0.94 | 1.7 hrs | 0.94 |
| Adams-Columbia Electric Coop | 2020 | 2.6 hrs | 0.71 | 2.6 hrs | 0.71 |
| 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 84% of Wisconsin's customers in 2020; 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, 2020, 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/2020/wisconsin/portage-county