County annual report · FIPS 55133
2016 Waukesha County, WI Power Outage Report
In 2016, customers in Waukesha County, WI went without power for an average of 2.4 hours, a total of 344K customer-hours (Wisconsin average 1.9 hours). That ranks 19th worst of 70 Wisconsin counties and 1194th of 2,391 nationally.
Compared with WI, the US and 2015
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Waukesha County, 2016
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 5, 2016 15:00 | June 7, 2016 10:30 | 1d 19h | 7,655 | 67K |
| 2 | March 16, 2016 09:30 | March 17, 2016 21:15 | 1d 11h | 6,421 | 29K |
| 3 | April 28, 2016 02:45 | April 28, 2016 05:45 | 3h | 5,199 | 6,631 |
| 4 | August 5, 2016 01:00 | August 5, 2016 14:15 | 13h 15m | 4,631 | 8,281 |
| 5 | July 1, 2016 00:45 | July 1, 2016 20:30 | 19h 45m | 4,362 | 19K |
| 6 | July 21, 2016 16:00 | July 22, 2016 22:30 | 1d 6h | 4,321 | 22K |
| 7 | May 28, 2016 21:15 | May 29, 2016 15:45 | 18h 30m | 4,069 | 10K |
| 8 | September 21, 2016 10:45 | September 22, 2016 05:15 | 18h 30m | 3,549 | 5,869 |
| 9 | July 26, 2016 22:30 | July 27, 2016 01:45 | 3h 15m | 3,452 | 4,150 |
| 10 | January 6, 2016 21:45 | January 6, 2016 23:00 | 1h 15m | 2,921 | 3,651 |
Outage episodes by size in 2016: 119 reached 100+ customers, 43 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 2016, 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 | 2016 | 2.6 hrs | 0.82 | 1.7 hrs | 0.66 |
| 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 2016; 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, 2016, 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/2016/wisconsin/waukesha-county