County annual report · FIPS 39107
2021 Mercer County, OH Power Outage Report
In 2021, customers in Mercer County, OH went without power for an average of 3.1 hours, a total of 58K customer-hours (Ohio average 4.2 hours). That ranks 62nd worst of 88 Ohio counties and 1814th of 2,974 nationally.
Compared with OH, the US and 2020
Coverage line is EAGLE-I's share of Ohio 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 | June 18, 2021 17:45 | June 20, 2021 01:45 | 1d 8h | 4,516 | 10K |
| 2 | August 11, 2021 19:30 | August 12, 2021 05:30 | 10h | 3,142 | 5,280 |
| 3 | June 18, 2021 13:45 | June 18, 2021 17:00 | 3h 15m | 1,224 | 922 |
| 4 | June 12, 2021 20:00 | June 13, 2021 02:30 | 6h 30m | 1,129 | 2,639 |
| 5 | July 17, 2021 14:30 | July 17, 2021 22:30 | 8h | 1,044 | 1,346 |
| 6 | October 14, 2021 21:30 | October 15, 2021 10:45 | 13h 15m | 909 | 1,025 |
| 7 | March 29, 2021 00:15 | March 29, 2021 01:45 | 1h 30m | 661 | 166 |
| 8 | January 26, 2021 05:00 | January 26, 2021 17:00 | 12h | 602 | 1,523 |
| 9 | April 26, 2021 00:15 | April 26, 2021 11:30 | 11h 15m | 478 | 185 |
| 10 | March 31, 2021 14:15 | March 31, 2021 19:00 | 4h 45m | 395 | 103 |
Outage episodes by size in 2021: 31 reached 100+ customers, 5 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 |
|---|---|---|---|---|---|
| Dayton Power & Light Co | 2021 | 3.0 hrs | 0.99 | 1.8 hrs | 0.81 |
| Pioneer Rural Elec Coop, Inc - (OH) | 2021 | 1.7 hrs | 1.01 | 1.7 hrs | 1.01 |
| Midwest Electric, Inc - (OH) | 2021 | 1.8 hrs | 1.19 | 81 min | 0.93 |
| 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 93% of Ohio's customers in 2021; 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, 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/ohio/mercer-county