County annual report · FIPS 34021
2025 Mercer County, NJ Power Outage Report
In 2025, customers in Mercer County, NJ went without power for an average of 2.5 hours, a total of 479K customer-hours (New Jersey average 3.3 hours). That ranks 13th worst of 21 New Jersey counties and 2241st of 3,000 nationally.
Compared with NJ, the US and 2024
Coverage line is EAGLE-I's share of New Jersey customers tracked each year.
Biggest outages in Mercer County, 2025
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 19, 2025 12:45 | June 22, 2025 23:00 | 3d 10h | 12,264 | 109K |
| 2 | December 19, 2025 12:30 | December 23, 2025 10:45 | 3d 22h | 5,731 | 23K |
| 3 | February 16, 2025 22:45 | February 21, 2025 11:15 | 4d 12h | 4,742 | 76K |
| 4 | December 26, 2025 21:45 | December 28, 2025 13:15 | 1d 15h | 4,228 | 4,517 |
| 5 | October 20, 2025 09:30 | October 23, 2025 09:45 | 3d | 3,950 | 8,119 |
| 6 | July 8, 2025 21:30 | July 11, 2025 14:45 | 2d 17h | 3,366 | 10K |
| 7 | July 25, 2025 16:30 | July 27, 2025 13:45 | 1d 21h | 3,120 | 20K |
| 8 | March 24, 2025 05:15 | March 26, 2025 18:30 | 2d 13h | 3,040 | 6,104 |
| 9 | September 10, 2025 12:45 | September 11, 2025 13:45 | 1d 1h | 2,919 | 1,210 |
| 10 | December 13, 2025 04:00 | December 18, 2025 22:15 | 5d 18h | 2,610 | 11K |
Outage episodes by size in 2025: 142 reached 100+ customers, 43 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 Mercer County reported on EIA Form 861 for 2025, 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 | 2024 | 45 min | 0.57 | 39 min | 0.55 |
| Jersey Central Power & Lt Co | 2024 | 8.0 hrs | 2.46 | 4.2 hrs | 1.95 |
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 New Jersey's customers in 2025; 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, 2025, 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/2025/new-jersey/mercer-county