County annual report · FIPS 55097
2023 Portage County, WI Power Outage Report
In 2023, customers in Portage County, WI went without power for an average of 1.0 hours, a total of 26K customer-hours (Wisconsin average 3.4 hours). That ranks 61st worst of 72 Wisconsin counties and 2688th of 2,977 nationally.
Compared with WI, the US and 2022
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Portage County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 23, 2023 17:15 | March 23, 2023 18:00 | 45m | 1,804 | 1,353 |
| 2 | August 12, 2023 00:45 | August 12, 2023 10:30 | 9h 45m | 981 | 2,818 |
| 3 | April 19, 2023 16:30 | April 20, 2023 03:45 | 11h 15m | 769 | 2,038 |
| 4 | September 30, 2023 14:45 | October 1, 2023 01:15 | 10h 30m | 708 | 2,017 |
| 5 | August 31, 2023 15:00 | August 31, 2023 18:45 | 3h 45m | 641 | 1,722 |
| 6 | March 1, 2023 15:30 | March 1, 2023 16:15 | 45m | 624 | 312 |
| 7 | March 23, 2023 15:45 | March 23, 2023 16:30 | 45m | 611 | 235 |
| 8 | May 1, 2023 13:30 | May 1, 2023 20:30 | 7h | 581 | 893 |
| 9 | September 26, 2023 12:15 | September 26, 2023 16:45 | 4h 30m | 575 | 723 |
| 10 | September 6, 2023 16:45 | September 6, 2023 20:15 | 3h 30m | 552 | 309 |
Outage episodes by size in 2023: 29 reached 100+ customers, 1 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 2023, 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 | 2023 | 2.5 hrs | 0.85 | 74 min | 0.67 |
| Adams-Columbia Electric Coop | 2023 | 3.8 hrs | 1.09 | 3.8 hrs | 1.09 |
| 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 n/a of Wisconsin's customers in 2023; 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, 2023, 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/2023/wisconsin/portage-county