County annual report · FIPS 42029
2018 Chester County, PA Power Outage Report
In 2018, customers in Chester County, PA went without power for an average of 8.4 hours, a total of 2.3M customer-hours (Pennsylvania average 8.3 hours). That ranks 21st worst of 67 Pennsylvania counties and 663rd of 2,798 nationally.
Compared with PA, the US and 2017
Coverage line is EAGLE-I's share of Pennsylvania customers tracked each year.
Biggest outages in Chester County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 2, 2018 01:00 | March 6, 2018 01:00 | 4d | 35,679 | 1.1M |
| 2 | June 30, 2018 19:15 | July 8, 2018 04:30 | 7d 9h | 26,291 | 270K |
| 3 | November 1, 2018 09:15 | November 7, 2018 22:45 | 6d 13h | 8,861 | 71K |
| 4 | July 20, 2018 10:45 | July 31, 2018 01:15 | 10d 14h | 7,553 | 94K |
| 5 | November 15, 2018 14:45 | November 22, 2018 11:30 | 6d 20h | 6,958 | 36K |
| 6 | March 6, 2018 03:15 | March 11, 2018 06:00 | 5d 2h | 6,604 | 90K |
| 7 | August 3, 2018 05:15 | August 17, 2018 15:15 | 14d 10h | 5,495 | 65K |
| 8 | October 11, 2018 13:45 | October 14, 2018 18:00 | 3d 4h | 5,433 | 25K |
| 9 | March 30, 2018 18:15 | April 6, 2018 10:45 | 6d 16h | 4,830 | 22K |
| 10 | May 15, 2018 11:00 | May 21, 2018 22:45 | 6d 11h | 4,022 | 27K |
Outage episodes by size in 2018: 144 reached 100+ customers, 48 reached 1,000+ customers, 2 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 2018, 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 | 2018 | 6.6 hrs | 1.05 | 81 min | 0.73 |
| PECO Energy Co | 2018 | 10.7 hrs | 1.51 | 88 min | 0.90 |
| 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 95% of Pennsylvania's customers in 2018; 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, 2018, 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/2018/pennsylvania/chester-county