County annual report · FIPS 55079
2020 Milwaukee County, WI Power Outage Report
In 2020, customers in Milwaukee County, WI went without power for an average of 1.6 hours, a total of 974K customer-hours (Wisconsin average 1.8 hours). That ranks 37th worst of 72 Wisconsin counties and 2407th 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 Milwaukee 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 | November 10, 2020 14:15 | November 12, 2020 04:15 | 1d 14h | 12,376 | 81K |
| 2 | July 7, 2020 12:30 | July 9, 2020 09:30 | 1d 21h | 10,569 | 57K |
| 3 | April 1, 2020 06:45 | April 1, 2020 07:00 | 15m | 8,964 | 2,241 |
| 4 | April 20, 2020 19:45 | April 22, 2020 00:45 | 1d 5h | 8,964 | 29K |
| 5 | August 25, 2020 08:30 | August 26, 2020 10:45 | 1d 2h | 8,948 | 54K |
| 6 | September 6, 2020 11:45 | September 7, 2020 05:45 | 18h | 8,942 | 35K |
| 7 | February 28, 2020 18:30 | February 28, 2020 18:45 | 15m | 8,811 | 2,203 |
| 8 | June 20, 2020 11:30 | June 21, 2020 19:15 | 1d 7h | 8,582 | 45K |
| 9 | July 9, 2020 11:15 | July 11, 2020 07:30 | 1d 20h | 8,143 | 46K |
| 10 | March 19, 2020 22:30 | March 20, 2020 17:15 | 18h 45m | 6,938 | 2,030 |
Outage episodes by size in 2020: 188 reached 100+ customers, 100 reached 1,000+ customers, 2 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 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 Electric Power Co | 2020 | 2.3 hrs | 0.87 | 1.6 hrs | 0.70 |
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 ÷ 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, 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/milwaukee-county