County annual report · FIPS 34021
2021 Mercer County, NJ Power Outage Report
In 2021, customers in Mercer County, NJ went without power for an average of 2.0 hours, a total of 392K customer-hours (New Jersey average 2.9 hours). That ranks 10th worst of 21 New Jersey counties and 2211th of 2,974 nationally.
Compared with NJ, the US and 2020
Coverage line is EAGLE-I's share of New Jersey 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 | May 17, 2021 01:15 | May 17, 2021 07:00 | 5h 45m | 24,909 | 22K |
| 2 | November 11, 2021 06:15 | November 11, 2021 06:30 | 15m | 15,008 | 3,752 |
| 3 | July 17, 2021 12:30 | July 20, 2021 14:00 | 3d 1h | 14,597 | 67K |
| 4 | March 16, 2021 06:15 | March 16, 2021 06:45 | 30m | 9,857 | 4,929 |
| 5 | September 1, 2021 19:00 | September 4, 2021 23:45 | 3d 4h | 7,462 | 40K |
| 6 | February 11, 2021 17:30 | February 11, 2021 20:15 | 2h 45m | 7,228 | 2,754 |
| 7 | September 24, 2021 07:15 | September 25, 2021 05:00 | 21h 45m | 5,195 | 1,588 |
| 8 | May 26, 2021 21:00 | May 27, 2021 03:00 | 6h | 4,313 | 7,769 |
| 9 | July 11, 2021 23:15 | July 13, 2021 20:00 | 1d 20h | 4,250 | 3,820 |
| 10 | June 8, 2021 11:30 | June 9, 2021 02:45 | 15h 15m | 4,126 | 7,816 |
Outage episodes by size in 2021: 146 reached 100+ customers, 57 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 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 |
|---|---|---|---|---|---|
| Public Service Elec & Gas Co | 2021 | 60 min | 0.66 | 41 min | 0.60 |
| Jersey Central Power & Lt Co | 2021 | 5.8 hrs | 1.89 | 3.2 hrs | 1.59 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 99% of New Jersey's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 193,667 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, NJ 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/new-jersey/mercer-county