County annual report · FIPS 39113
2021 Montgomery County, OH Power Outage Report
In 2021, customers in Montgomery County, OH went without power for an average of 1.6 hours, a total of 472K customer-hours (Ohio average 4.2 hours). That ranks 80th worst of 88 Ohio counties and 2410th 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 Montgomery 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 10:00 | June 22, 2021 03:30 | 3d 17h | 7,528 | 79K |
| 2 | August 4, 2021 12:30 | August 5, 2021 18:30 | 1d 6h | 5,629 | 8,573 |
| 3 | August 25, 2021 12:45 | August 28, 2021 11:00 | 2d 22h | 4,962 | 32K |
| 4 | March 24, 2021 14:15 | March 29, 2021 01:45 | 4d 11h | 4,704 | 46K |
| 5 | September 18, 2021 21:30 | September 19, 2021 22:30 | 1d 1h | 4,287 | 3,439 |
| 6 | November 11, 2021 15:30 | November 13, 2021 06:15 | 1d 14h | 4,203 | 13K |
| 7 | August 6, 2021 13:30 | August 8, 2021 17:45 | 2d 4h | 4,095 | 9,678 |
| 8 | March 22, 2021 13:00 | March 22, 2021 23:15 | 10h 15m | 4,003 | 5,915 |
| 9 | February 19, 2021 02:15 | February 19, 2021 11:15 | 9h | 3,842 | 2,235 |
| 10 | July 16, 2021 12:15 | July 19, 2021 01:45 | 2d 13h | 3,621 | 16K |
Outage episodes by size in 2021: 124 reached 100+ customers, 40 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 Montgomery 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 |
| Duke Energy Ohio Inc | 2021 | 2.4 hrs | 1.02 | 2.1 hrs | 0.95 |
| Pioneer Rural Elec Coop, Inc - (OH) | 2021 | 1.7 hrs | 1.01 | 1.7 hrs | 1.01 |
| Butler Rural Electric Coop Inc - (OH) | 2021 | 3.6 hrs | 2.85 | 1.8 hrs | 2.05 |
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 ÷ 295,834 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. Montgomery County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Montgomery 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/montgomery-county