County annual report · FIPS 55089
2025 Ozaukee County, WI Power Outage Report
In 2025, customers in Ozaukee County, WI went without power for an average of 3.7 hours, a total of 126K customer-hours (Wisconsin average 3.9 hours). That ranks 24th worst of 72 Wisconsin counties and 1854th of 3,000 nationally.
Compared with WI, the US and 2024
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Ozaukee County, 2025
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 29, 2025 20:45 | November 30, 2025 19:00 | 22h 15m | 6,942 | 32K |
| 2 | June 8, 2025 09:15 | June 8, 2025 11:45 | 2h 30m | 3,473 | 2,593 |
| 3 | June 4, 2025 06:30 | June 4, 2025 16:30 | 10h | 3,296 | 17K |
| 4 | November 18, 2025 15:00 | November 18, 2025 17:45 | 2h 45m | 2,063 | 3,609 |
| 5 | May 31, 2025 17:30 | May 31, 2025 20:30 | 3h | 1,760 | 2,740 |
| 6 | August 9, 2025 21:30 | August 12, 2025 00:45 | 2d 3h | 1,607 | 18K |
| 7 | April 18, 2025 13:15 | April 18, 2025 18:00 | 4h 45m | 1,381 | 1,522 |
| 8 | July 22, 2025 20:15 | July 22, 2025 22:30 | 2h 15m | 1,291 | 781 |
| 9 | September 13, 2025 09:45 | September 13, 2025 20:45 | 11h | 1,208 | 2,640 |
| 10 | June 21, 2025 17:15 | June 23, 2025 00:45 | 1d 7h | 1,175 | 7,308 |
Outage episodes by size in 2025: 36 reached 100+ customers, 13 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 2025, 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 | 2024 | 4.9 hrs | 1.04 | 1.8 hrs | 0.74 |
| 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 n/a of Wisconsin's customers in 2025; 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, 2025, 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/2025/wisconsin/ozaukee-county