County annual report · FIPS 39023
2021 Clark County, OH Power Outage Report
In 2021, customers in Clark County, OH went without power for an average of 1.5 hours, a total of 125K customer-hours (Ohio average 4.2 hours). That ranks 82nd worst of 88 Ohio counties and 2474th 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 Clark 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 | October 11, 2021 13:45 | October 11, 2021 23:15 | 9h 30m | 9,468 | 19K |
| 2 | January 3, 2021 03:00 | January 3, 2021 06:45 | 3h 45m | 5,729 | 3,819 |
| 3 | December 11, 2021 04:15 | December 13, 2021 01:00 | 1d 20h | 5,541 | 13K |
| 4 | March 10, 2021 14:00 | March 10, 2021 18:45 | 4h 45m | 2,292 | 1,767 |
| 5 | August 7, 2021 04:15 | August 8, 2021 03:30 | 23h 15m | 2,250 | 1,081 |
| 6 | March 26, 2021 05:15 | March 27, 2021 14:00 | 1d 8h | 1,863 | 8,901 |
| 7 | July 25, 2021 06:30 | July 25, 2021 22:15 | 15h 45m | 1,854 | 7,749 |
| 8 | August 26, 2021 19:00 | August 27, 2021 03:15 | 8h 15m | 1,332 | 1,954 |
| 9 | October 12, 2021 13:15 | October 13, 2021 02:15 | 13h | 1,155 | 1,914 |
| 10 | June 27, 2021 01:00 | June 27, 2021 04:00 | 3h | 1,137 | 862 |
Outage episodes by size in 2021: 73 reached 100+ customers, 12 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 Clark 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 |
|---|---|---|---|---|---|
| Ohio Edison Co | 2021 | 2.7 hrs | 1.40 | 1.9 hrs | 1.23 |
| 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 |
| South Vienna Corporation | - | - | - | - | - |
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 ÷ 83,871 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. Clark County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clark 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/clark-county