County annual report · FIPS 42029
2020 Chester County, PA Power Outage Report
In 2020, customers in Chester County, PA went without power for an average of 25.6 hours, a total of 6.8M customer-hours (Pennsylvania average 6.5 hours). That ranks 4th worst of 67 Pennsylvania counties and 330th of 3,019 nationally.
Compared with PA, the US and 2019
Coverage line is EAGLE-I's share of Pennsylvania customers tracked each year.
Biggest outages in Chester County, 2020
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 4, 2020 07:30 | August 15, 2020 13:00 | 11d 5h | 110,546 | 3.3M |
| 2 | June 3, 2020 12:00 | June 13, 2020 01:45 | 9d 13h | 72,581 | 2.7M |
| 3 | December 24, 2020 14:45 | December 30, 2020 02:00 | 5d 11h | 21,299 | 260K |
| 4 | November 15, 2020 19:00 | November 17, 2020 23:30 | 2d 4h | 9,278 | 37K |
| 5 | March 4, 2020 01:45 | March 5, 2020 09:45 | 1d 8h | 8,374 | 26K |
| 6 | July 2, 2020 13:30 | July 15, 2020 10:45 | 12d 21h | 7,093 | 80K |
| 7 | July 23, 2020 21:00 | July 26, 2020 00:00 | 2d 3h | 6,399 | 17K |
| 8 | February 7, 2020 14:15 | February 19, 2020 03:45 | 11d 13h | 5,509 | 40K |
| 9 | April 9, 2020 17:00 | April 12, 2020 06:45 | 2d 13h | 5,325 | 32K |
| 10 | November 18, 2020 14:45 | November 22, 2020 08:30 | 3d 17h | 4,702 | 4,019 |
Outage episodes by size in 2020: 172 reached 100+ customers, 52 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 2020, 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 | 2020 | 2.0 hrs | 0.88 | 69 min | 0.69 |
| PECO Energy Co | 2020 | 10.5 hrs | 1.52 | 76 min | 0.82 |
| 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 98% of Pennsylvania's customers in 2020; 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, 2020, 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/2020/pennsylvania/chester-county