County annual report · FIPS 39017
2021 Butler County, OH Power Outage Report
In 2021, customers in Butler County, OH went without power for an average of 1.9 hours, a total of 248K customer-hours (Ohio average 4.2 hours). That ranks 76th worst of 88 Ohio counties and 2238th 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 Butler 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 22:45 | June 21, 2021 00:30 | 2d 1h | 6,628 | 28K |
| 2 | August 27, 2021 19:15 | August 28, 2021 23:15 | 1d 4h | 5,907 | 13K |
| 3 | July 22, 2021 09:45 | July 23, 2021 03:45 | 18h | 4,337 | 6,440 |
| 4 | March 26, 2021 05:00 | March 27, 2021 04:00 | 23h | 4,188 | 29K |
| 5 | December 5, 2021 13:45 | December 5, 2021 17:00 | 3h 15m | 3,263 | 6,815 |
| 6 | August 11, 2021 02:00 | August 11, 2021 10:30 | 8h 30m | 2,861 | 725 |
| 7 | September 16, 2021 07:00 | September 17, 2021 20:00 | 1d 13h | 2,826 | 5,498 |
| 8 | January 5, 2021 06:00 | January 5, 2021 08:15 | 2h 15m | 2,819 | 3,525 |
| 9 | May 25, 2021 12:45 | May 25, 2021 18:45 | 6h | 2,772 | 1,343 |
| 10 | August 9, 2021 01:00 | August 9, 2021 16:45 | 15h 45m | 2,628 | 915 |
Outage episodes by size in 2021: 125 reached 100+ customers, 28 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 Butler 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 |
| Butler Rural Electric Coop Inc - (OH) | 2021 | 3.6 hrs | 2.85 | 1.8 hrs | 2.05 |
| City of Hamilton - (OH) | 2021 | 53 min | 0.77 | 53 min | 0.77 |
| Duke Energy | - | - | - | - | - |
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 ÷ 127,599 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. Butler County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Butler 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/butler-county