County annual report · FIPS 42029
2025 Chester County, PA Power Outage Report
In 2025, customers in Chester County, PA went without power for an average of 8.0 hours, a total of 2.1M customer-hours (Pennsylvania average 9.8 hours). That ranks 33rd worst of 67 Pennsylvania counties and 1027th of 3,000 nationally.
Compared with PA, the US and 2024
Coverage line is EAGLE-I's share of Pennsylvania customers tracked each year.
Biggest outages in Chester County, 2025
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 15, 2025 10:45 | July 6, 2025 07:45 | 20d 21h | 50,268 | 904K |
| 2 | February 9, 2025 16:15 | February 24, 2025 03:30 | 14d 11h | 29,736 | 469K |
| 3 | July 6, 2025 10:30 | July 23, 2025 23:45 | 17d 13h | 13,166 | 101K |
| 4 | December 18, 2025 07:15 | December 25, 2025 00:30 | 6d 17h | 12,372 | 128K |
| 5 | February 28, 2025 11:30 | March 13, 2025 08:30 | 12d 21h | 8,459 | 86K |
| 6 | January 1, 2025 00:00 | January 7, 2025 10:15 | 6d 10h | 4,665 | 19K |
| 7 | June 3, 2025 02:00 | June 4, 2025 23:45 | 1d 21h | 4,538 | 7,982 |
| 8 | July 27, 2025 03:00 | August 7, 2025 11:45 | 11d 8h | 3,956 | 26K |
| 9 | December 14, 2025 06:15 | December 16, 2025 10:15 | 2d 4h | 3,909 | 24K |
| 10 | December 28, 2025 22:15 | January 1, 2026 00:00 | 3d 1h | 3,849 | 19K |
Outage episodes by size in 2025: 105 reached 100+ customers, 30 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 Chester County reported on EIA Form 861 for 2025, 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 |
|---|---|---|---|---|---|
| FirstEnergy Pennsylvania Electric Co | 2024 | 6.7 hrs | 1.85 | 3.7 hrs | 1.49 |
| PPL Electric Utilities Corp | 2024 | 7.6 hrs | 1.25 | 1.5 hrs | 0.66 |
| PECO Energy Co | 2024 | 3.5 hrs | 0.97 | 60 min | 0.67 |
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 Pennsylvania's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 267,257 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. Chester County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Chester County, PA annual power outage report, 2025, 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/2025/pennsylvania/chester-county