County annual report · FIPS 42003
2021 Allegheny County, PA Power Outage Report
In 2021, customers in Allegheny County, PA went without power for an average of 3.0 hours, a total of 2.0M customer-hours (Pennsylvania average 4.1 hours). That ranks 52nd worst of 67 Pennsylvania counties and 1831st 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 Allegheny 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 10, 2021 11:15 | August 17, 2021 02:30 | 6d 15h | 31,137 | 392K |
| 2 | July 4, 2021 20:30 | July 10, 2021 20:30 | 6d | 27,219 | 286K |
| 3 | June 13, 2021 21:45 | June 18, 2021 05:30 | 4d 7h | 25,092 | 312K |
| 4 | March 26, 2021 03:45 | March 28, 2021 00:30 | 1d 20h | 11,567 | 74K |
| 5 | August 29, 2021 19:30 | September 4, 2021 04:30 | 5d 9h | 9,563 | 96K |
| 6 | December 11, 2021 13:00 | December 14, 2021 08:00 | 2d 19h | 9,534 | 45K |
| 7 | June 21, 2021 12:45 | June 23, 2021 22:15 | 2d 9h | 7,269 | 53K |
| 8 | June 29, 2021 10:00 | July 3, 2021 12:00 | 4d 2h | 5,368 | 108K |
| 9 | July 13, 2021 08:00 | July 14, 2021 05:00 | 21h | 5,129 | 26K |
| 10 | August 23, 2021 13:00 | August 27, 2021 09:30 | 3d 20h | 4,875 | 40K |
Outage episodes by size in 2021: 249 reached 100+ customers, 51 reached 1,000+ customers, 4 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 Allegheny 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) | - | - | - | - | - |
| Duquesne Light Co | - | - | - | - | - |
| Borough of Pitcairn - (PA) | - | - | - | - | - |
| Borough of Tarentum - (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 ÷ 667,166 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. Allegheny County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Allegheny 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/allegheny-county