County annual report · FIPS 42019
2021 Butler County, PA Power Outage Report
In 2021, customers in Butler County, PA went without power for an average of 4.2 hours, a total of 379K customer-hours (Pennsylvania average 4.1 hours). That ranks 42nd worst of 67 Pennsylvania counties and 1504th of 2,974 nationally.
Compared with PA, the US and 2020
Coverage line is EAGLE-I's share of Pennsylvania customers tracked each year.
Biggest outages in Butler 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 | August 25, 2021 20:45 | August 27, 2021 03:00 | 1d 6h | 5,692 | 33K |
| 2 | August 29, 2021 17:30 | August 30, 2021 21:30 | 1d 4h | 5,468 | 25K |
| 3 | December 11, 2021 06:15 | December 13, 2021 08:30 | 2d 2h | 5,354 | 28K |
| 4 | March 26, 2021 10:00 | March 27, 2021 21:15 | 1d 11h | 3,188 | 11K |
| 5 | July 16, 2021 18:30 | July 18, 2021 05:00 | 1d 10h | 3,008 | 22K |
| 6 | May 31, 2021 19:45 | June 1, 2021 01:45 | 6h | 2,859 | 9,779 |
| 7 | December 13, 2021 18:30 | December 13, 2021 19:30 | 1h | 2,829 | 1,054 |
| 8 | April 29, 2021 20:00 | April 30, 2021 05:30 | 9h 30m | 2,742 | 3,769 |
| 9 | June 18, 2021 19:00 | June 22, 2021 16:30 | 3d 21h | 2,494 | 9,440 |
| 10 | May 28, 2021 13:15 | May 29, 2021 03:15 | 14h | 2,321 | 1,394 |
Outage episodes by size in 2021: 126 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 Butler 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 |
|---|---|---|---|---|---|
| West Penn Power Company | 2021 | 4.2 hrs | 1.39 | 2.5 hrs | 1.07 |
| Pennsylvania Power Co | 2021 | 2.5 hrs | 1.13 | 1.7 hrs | 0.92 |
| FirstEnergy Pennsylvania Electric Co | - | - | - | - | - |
| Central Electric Coop, Inc - (PA) | - | - | - | - | - |
| Borough of Zelienople - (PA) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 98% of Pennsylvania's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 91,173 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. Butler County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Butler County, PA 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/pennsylvania/butler-county