County annual report · FIPS 55133
2017 Waukesha County, WI Power Outage Report
In 2017, customers in Waukesha County, WI went without power for an average of 2.0 hours, a total of 293K customer-hours (Wisconsin average 2.9 hours). That ranks 42nd worst of 72 Wisconsin counties and 1613th of 2,786 nationally.
Compared with WI, the US and 2016
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Waukesha County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 20, 2017 07:00 | April 21, 2017 02:45 | 19h 45m | 6,281 | 38K |
| 2 | May 26, 2017 00:00 | May 26, 2017 02:45 | 2h 45m | 6,122 | 12K |
| 3 | May 17, 2017 22:00 | May 19, 2017 08:15 | 1d 10h | 4,947 | 22K |
| 4 | May 11, 2017 12:30 | May 11, 2017 12:45 | 15m | 3,455 | 864 |
| 5 | June 19, 2017 14:45 | June 20, 2017 10:15 | 19h 30m | 3,447 | 5,017 |
| 6 | April 26, 2017 18:45 | April 27, 2017 00:45 | 6h | 3,372 | 2,547 |
| 7 | March 8, 2017 11:15 | March 10, 2017 00:00 | 1d 12h | 3,371 | 31K |
| 8 | June 12, 2017 21:00 | June 14, 2017 11:45 | 1d 14h | 3,095 | 15K |
| 9 | April 14, 2017 15:45 | April 14, 2017 17:30 | 1h 45m | 2,379 | 3,565 |
| 10 | November 15, 2017 14:30 | November 15, 2017 16:30 | 2h | 2,378 | 3,569 |
Outage episodes by size in 2017: 106 reached 100+ customers, 34 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 Waukesha County reported on EIA Form 861 for 2017, 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 | 2017 | 2.3 hrs | 0.75 | 57 min | 0.51 |
| Oconomowoc Utilities | - | - | - | - | - |
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 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 143,177 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. Waukesha County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Waukesha County, WI annual power outage report, 2017, 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/2017/wisconsin/waukesha-county