County annual report · FIPS 42029
2017 Chester County, PA Power Outage Report
In 2017, customers in Chester County, PA went without power for an average of 2.4 hours, a total of 654K customer-hours (Pennsylvania average 3.2 hours). That ranks 51st worst of 67 Pennsylvania counties and 1496th of 2,786 nationally.
Compared with PA, the US and 2016
Coverage line is EAGLE-I's share of Pennsylvania customers tracked each year.
Biggest outages in Chester County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 23, 2017 06:45 | January 25, 2017 06:00 | 1d 23h | 12,682 | 61K |
| 2 | October 24, 2017 02:45 | October 24, 2017 23:15 | 20h 30m | 8,768 | 17K |
| 3 | June 23, 2017 12:15 | June 28, 2017 01:00 | 4d 12h | 7,801 | 12K |
| 4 | January 3, 2017 13:15 | January 4, 2017 01:15 | 12h | 5,273 | 9,299 |
| 5 | June 18, 2017 18:00 | June 21, 2017 08:45 | 2d 14h | 4,999 | 26K |
| 6 | October 9, 2017 11:45 | October 11, 2017 01:45 | 1d 14h | 4,855 | 6,781 |
| 7 | July 7, 2017 11:30 | July 9, 2017 23:45 | 2d 12h | 4,698 | 7,105 |
| 8 | November 18, 2017 21:00 | November 21, 2017 05:15 | 2d 8h | 4,564 | 18K |
| 9 | June 21, 2017 13:00 | June 23, 2017 06:45 | 1d 17h | 4,429 | 15K |
| 10 | September 28, 2017 12:00 | September 29, 2017 22:15 | 1d 10h | 4,225 | 5,736 |
Outage episodes by size in 2017: 215 reached 100+ customers, 71 reached 1,000+ customers, 1 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 2017, 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 | 2017 | 2.3 hrs | 0.73 | 70 min | 0.60 |
| PECO Energy Co | 2017 | 1.5 hrs | 0.87 | 74 min | 0.79 |
| 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 2017; 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, 2017, 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/2017/pennsylvania/chester-county