County annual report · FIPS 42085
2021 Mercer County, PA Power Outage Report
In 2021, customers in Mercer County, PA went without power for an average of 3.9 hours, a total of 188K customer-hours (Pennsylvania average 4.1 hours). That ranks 44th worst of 67 Pennsylvania counties and 1571st of 2,974 nationally.
Compared with PA, the US and 2020
Coverage line is EAGLE-I's share of Pennsylvania customers tracked each year.
Biggest outages in Mercer County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 16, 2021 09:30 | July 19, 2021 02:00 | 2d 16h | 6,522 | 31K |
| 2 | October 4, 2021 13:00 | October 5, 2021 06:00 | 17h | 6,088 | 3,475 |
| 3 | July 13, 2021 11:00 | July 16, 2021 02:30 | 2d 15h | 4,811 | 41K |
| 4 | February 21, 2021 06:30 | February 21, 2021 07:30 | 1h | 2,081 | 1,042 |
| 5 | July 7, 2021 17:30 | July 10, 2021 01:30 | 2d 8h | 1,811 | 7,134 |
| 6 | December 11, 2021 12:30 | December 13, 2021 06:30 | 1d 18h | 1,398 | 9,565 |
| 7 | June 8, 2021 05:00 | June 9, 2021 03:00 | 22h | 1,355 | 2,841 |
| 8 | June 29, 2021 17:00 | July 2, 2021 04:00 | 2d 11h | 1,307 | 5,152 |
| 9 | November 26, 2021 11:30 | November 26, 2021 15:30 | 4h | 1,280 | 1,740 |
| 10 | March 26, 2021 10:00 | March 29, 2021 23:15 | 3d 13h | 1,278 | 16K |
Outage episodes by size in 2021: 51 reached 100+ customers, 10 reached 1,000+ customers, 0 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 Mercer County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| Pennsylvania Power Co | 2021 | 2.5 hrs | 1.13 | 1.7 hrs | 0.92 |
| FirstEnergy Pennsylvania Electric Co | - | - | - | - | - |
| Central Electric Coop, Inc - (PA) | - | - | - | - | - |
| Northwestern Rural E C A, Inc - (PA) | - | - | - | - | - |
| Borough of Grove City - (PA) | - | - | - | - | - |
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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 48,402 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. Mercer County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mercer County, PA annual power outage report, 2021, 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/2021/pennsylvania/mercer-county