County annual report · FIPS 39107
2025 Mercer County, OH Power Outage Report
In 2025, customers in Mercer County, OH went without power for an average of 3.7 hours, a total of 71K customer-hours (Ohio average 4.0 hours). That ranks 43rd worst of 88 Ohio counties and 1831st of 3,000 nationally.
Compared with OH, the US and 2024
Coverage line is EAGLE-I's share of Ohio 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 | April 3, 2025 03:00 | April 4, 2025 03:00 | 1d | 6,108 | 33K |
| 2 | March 20, 2025 03:00 | March 20, 2025 20:30 | 17h 30m | 4,658 | 6,133 |
| 3 | December 18, 2025 15:15 | December 18, 2025 22:30 | 7h 15m | 1,923 | 5,133 |
| 4 | February 25, 2025 17:15 | February 25, 2025 19:00 | 1h 45m | 1,359 | 1,611 |
| 5 | September 7, 2025 21:00 | September 8, 2025 03:15 | 6h 15m | 1,271 | 1,612 |
| 6 | July 22, 2025 17:15 | July 22, 2025 21:30 | 4h 15m | 1,182 | 1,061 |
| 7 | June 3, 2025 19:15 | June 3, 2025 20:15 | 1h | 1,177 | 1,177 |
| 8 | May 9, 2025 12:15 | May 9, 2025 13:15 | 1h | 1,151 | 664 |
| 9 | September 21, 2025 14:00 | September 21, 2025 15:00 | 1h | 1,044 | 275 |
| 10 | November 30, 2025 12:30 | November 30, 2025 18:30 | 6h | 885 | 1,450 |
Outage episodes by size in 2025: 31 reached 100+ customers, 9 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 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 |
|---|---|---|---|---|---|
| Dayton Power & Light Co | 2024 | 8.4 hrs | 1.26 | 1.8 hrs | 0.87 |
| Pioneer Rural Elec Coop, Inc - (OH) | 2024 | 2.1 hrs | 1.25 | 1.6 hrs | 1.05 |
| Midwest Electric, Inc - (OH) | 2024 | 4.9 hrs | 1.77 | 89 min | 1.01 |
| Darke Rural Electric Coop, Inc | - | - | - | - | - |
| City of Celina - (OH) | - | - | - | - | - |
| City of Mendon - (OH) | - | - | - | - | - |
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 Ohio's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 18,878 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, OH 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/ohio/mercer-county