County annual report · FIPS 55089
2021 Ozaukee County, WI Power Outage Report
In 2021, customers in Ozaukee County, WI went without power for an average of 7.1 hours, a total of 244K customer-hours (Wisconsin average 4.7 hours). That ranks 13th worst of 72 Wisconsin counties and 1030th of 2,974 nationally.
Compared with WI, the US and 2020
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Ozaukee County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 16, 2021 03:15 | December 19, 2021 23:45 | 3d 20h | 5,880 | 111K |
| 2 | August 11, 2021 00:15 | August 11, 2021 12:45 | 12h 30m | 5,543 | 24K |
| 3 | August 6, 2021 20:30 | August 9, 2021 10:30 | 2d 14h | 4,824 | 30K |
| 4 | February 26, 2021 08:30 | February 26, 2021 12:45 | 4h 15m | 3,460 | 880 |
| 5 | April 11, 2021 11:15 | April 11, 2021 19:15 | 8h | 3,138 | 1,962 |
| 6 | August 28, 2021 20:45 | August 29, 2021 14:30 | 17h 45m | 2,926 | 6,111 |
| 7 | October 25, 2021 03:15 | October 26, 2021 01:00 | 21h 45m | 2,211 | 2,197 |
| 8 | August 11, 2021 18:15 | August 14, 2021 13:45 | 2d 19h | 1,916 | 19K |
| 9 | July 15, 2021 16:15 | July 15, 2021 16:30 | 15m | 1,907 | 477 |
| 10 | August 11, 2021 15:30 | August 11, 2021 17:15 | 1h 45m | 1,583 | 1,526 |
Outage episodes by size in 2021: 42 reached 100+ customers, 11 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 Ozaukee County reported on EIA Form 861 for 2021, 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 | 2021 | 7.0 hrs | 1.13 | 1.7 hrs | 0.73 |
| Cedarburg Light & Water 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 85% of Wisconsin's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 34,422 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. Ozaukee County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Ozaukee County, WI annual power outage report, 2021, 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/2021/wisconsin/ozaukee-county