County annual report · FIPS 55079
2023 Milwaukee County, WI Power Outage Report
In 2023, customers in Milwaukee County, WI went without power for an average of 4.0 hours, a total of 2.4M customer-hours (Wisconsin average 3.4 hours). That ranks 18th worst of 72 Wisconsin counties and 1668th 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 Milwaukee 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 10, 2023 03:15 | March 13, 2023 07:30 | 3d 4h | 89,708 | 1.1M |
| 2 | June 25, 2023 06:15 | June 28, 2023 05:15 | 2d 23h | 28,030 | 248K |
| 3 | July 27, 2023 11:45 | August 1, 2023 05:00 | 4d 17h | 24,016 | 405K |
| 4 | August 11, 2023 13:45 | August 13, 2023 09:30 | 1d 19h | 7,480 | 25K |
| 5 | January 19, 2023 12:30 | January 19, 2023 23:45 | 11h 15m | 6,512 | 7,093 |
| 6 | December 9, 2023 07:30 | December 10, 2023 04:45 | 21h 15m | 6,124 | 27K |
| 7 | January 10, 2023 13:15 | January 11, 2023 00:30 | 11h 15m | 6,033 | 11K |
| 8 | February 9, 2023 13:30 | February 11, 2023 03:30 | 1d 14h | 5,843 | 7,606 |
| 9 | December 13, 2023 16:00 | December 14, 2023 01:00 | 9h | 5,599 | 6,255 |
| 10 | August 14, 2023 13:15 | August 16, 2023 03:15 | 1d 14h | 5,555 | 27K |
Outage episodes by size in 2023: 179 reached 100+ customers, 82 reached 1,000+ customers, 3 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 Milwaukee 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 Electric Power Co | 2023 | 4.5 hrs | 1.04 | 85 min | 0.68 |
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 ÷ 594,641 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. Milwaukee County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Milwaukee 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/milwaukee-county