County annual report · FIPS 42029
2023 Chester County, PA Power Outage Report
In 2023, customers in Chester County, PA went without power for an average of 5.2 hours, a total of 1.4M customer-hours (Pennsylvania average 4.9 hours). That ranks 35th worst of 67 Pennsylvania counties and 1430th of 2,977 nationally.
Compared with PA, the US and 2022
Coverage line is EAGLE-I's share of Pennsylvania customers tracked each year.
Biggest outages in Chester County, 2023
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 6, 2023 23:00 | August 12, 2023 04:00 | 5d 5h | 50,218 | 665K |
| 2 | April 1, 2023 22:45 | April 6, 2023 02:30 | 4d 3h | 12,847 | 67K |
| 3 | June 16, 2023 12:45 | June 20, 2023 23:45 | 4d 11h | 11,050 | 47K |
| 4 | July 18, 2023 16:00 | August 2, 2023 11:15 | 14d 19h | 6,123 | 68K |
| 5 | June 21, 2023 04:00 | June 29, 2023 09:00 | 8d 5h | 6,034 | 70K |
| 6 | March 14, 2023 14:00 | March 17, 2023 11:15 | 2d 21h | 5,086 | 16K |
| 7 | August 12, 2023 09:00 | August 23, 2023 22:45 | 11d 13h | 4,850 | 41K |
| 8 | November 16, 2023 12:15 | November 20, 2023 20:15 | 4d 8h | 4,354 | 4,104 |
| 9 | December 17, 2023 21:15 | December 21, 2023 16:15 | 3d 19h | 4,149 | 29K |
| 10 | September 23, 2023 07:45 | September 29, 2023 23:30 | 6d 15h | 3,754 | 39K |
Outage episodes by size in 2023: 161 reached 100+ customers, 40 reached 1,000+ customers, 3 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 2023, 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 |
|---|---|---|---|---|---|
| PPL Electric Utilities Corp | 2023 | 2.5 hrs | 0.80 | 1.5 hrs | 0.64 |
| PECO Energy Co | 2023 | 2.1 hrs | 0.88 | 79 min | 0.76 |
| FirstEnergy Pennsylvania Electric Co | - | - | - | - | - |
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 2023; 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, 2023, 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/2023/pennsylvania/chester-county