County annual report · FIPS 42029
2015 Chester County, PA Power Outage Report
In 2015, customers in Chester County, PA went without power for an average of 10.6 hours, a total of 2.8M customer-hours (Pennsylvania average 3.2 hours). That ranks 5th worst of 66 Pennsylvania counties and 249th of 2,484 nationally.
Compared with PA, the US
Coverage line is EAGLE-I's share of Pennsylvania customers tracked each year.
Biggest outages in Chester County, 2015
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 23, 2015 20:30 | June 29, 2015 09:00 | 5d 12h | 75,718 | 2.3M |
| 2 | February 2, 2015 02:45 | February 3, 2015 10:30 | 1d 7h | 9,474 | 18K |
| 3 | March 29, 2015 17:45 | March 30, 2015 12:00 | 18h 15m | 8,053 | 2,382 |
| 4 | October 2, 2015 09:30 | October 4, 2015 23:00 | 2d 13h | 7,580 | 18K |
| 5 | December 11, 2015 19:15 | December 16, 2015 00:45 | 4d 5h | 5,618 | 7,285 |
| 6 | July 20, 2015 09:45 | July 22, 2015 19:15 | 2d 9h | 5,026 | 10K |
| 7 | March 19, 2015 12:45 | March 20, 2015 00:15 | 11h 30m | 4,827 | 3,241 |
| 8 | June 1, 2015 06:15 | June 2, 2015 09:15 | 1d 3h | 4,666 | 6,262 |
| 9 | April 22, 2015 14:30 | April 23, 2015 09:00 | 18h 30m | 4,590 | 7,217 |
| 10 | July 9, 2015 10:45 | July 11, 2015 12:15 | 2d 1h | 4,535 | 19K |
Outage episodes by size in 2015: 254 reached 100+ customers, 90 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 2015, 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 | 2015 | 86 min | 0.74 | 76 min | 0.67 |
| PECO Energy Co | 2015 | 3.8 hrs | 0.94 | 65 min | 0.75 |
| 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 2015; 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, 2015, 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/2015/pennsylvania/chester-county