County annual report · FIPS 55105
2019 Rock County, WI Power Outage Report
In 2019, customers in Rock County, WI went without power for an average of 1.7 hours, a total of 94K customer-hours (Wisconsin average 4.4 hours). That ranks 50th worst of 71 Wisconsin counties and 2200th of 2,945 nationally.
Compared with WI, the US and 2018
Coverage line is EAGLE-I's share of Wisconsin customers tracked each year.
Biggest outages in Rock County, 2019
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 11, 2019 12:00 | April 12, 2019 03:15 | 15h 15m | 9,625 | 17K |
| 2 | June 25, 2019 11:30 | June 25, 2019 22:30 | 11h | 3,552 | 1,135 |
| 3 | July 2, 2019 12:45 | July 2, 2019 19:00 | 6h 15m | 2,860 | 4,045 |
| 4 | February 7, 2019 21:00 | February 8, 2019 05:00 | 8h | 2,790 | 5,412 |
| 5 | August 5, 2019 21:15 | August 6, 2019 01:45 | 4h 30m | 2,724 | 3,460 |
| 6 | October 3, 2019 00:30 | October 3, 2019 01:45 | 1h 15m | 2,233 | 639 |
| 7 | June 27, 2019 21:45 | June 28, 2019 06:45 | 9h | 2,023 | 6,911 |
| 8 | January 30, 2019 08:00 | January 30, 2019 16:00 | 8h | 1,674 | 4,032 |
| 9 | July 21, 2019 18:45 | July 21, 2019 22:15 | 3h 30m | 1,636 | 1,229 |
| 10 | June 8, 2019 03:15 | June 8, 2019 04:15 | 1h | 1,635 | 1,628 |
Outage episodes by size in 2019: 80 reached 100+ customers, 12 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 Rock County reported on EIA Form 861 for 2019, 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 | 2018 | 2.0 hrs | 0.73 | 70 min | 0.59 |
| City of Stoughton - (WI) | 2018 | 4.0 hrs | 1.10 | 51 min | 0.65 |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Wisconsin Power & Light Co | - | - | - | - | - |
| Rock Energy Cooperative | - | - | - | - | - |
| Brodhead Water & Lighting Comm | - | - | - | - | - |
| City of Evansville | - | - | - | - | - |
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 2019; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 56,401 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. Rock County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Rock County, WI annual power outage report, 2019, 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/2019/wisconsin/rock-county