County annual report · FIPS 39041
2021 Delaware County, OH Power Outage Report
In 2021, customers in Delaware County, OH went without power for an average of 5.9 hours, a total of 383K customer-hours (Ohio average 4.2 hours). That ranks 19th worst of 88 Ohio counties and 1163rd 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 Delaware 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 | April 21, 2021 04:45 | April 22, 2021 04:15 | 23h 30m | 8,795 | 58K |
| 2 | July 22, 2021 13:00 | July 22, 2021 22:15 | 9h 15m | 8,468 | 6,385 |
| 3 | June 29, 2021 01:45 | June 29, 2021 04:45 | 3h | 7,719 | 20K |
| 4 | November 13, 2021 04:15 | November 13, 2021 13:45 | 9h 30m | 5,789 | 10K |
| 5 | May 18, 2021 11:15 | May 18, 2021 18:15 | 7h | 4,990 | 9,208 |
| 6 | March 30, 2021 21:30 | March 31, 2021 00:00 | 2h 30m | 4,687 | 1,181 |
| 7 | May 24, 2021 11:45 | May 25, 2021 07:00 | 19h 15m | 4,318 | 9,197 |
| 8 | April 9, 2021 13:00 | April 10, 2021 03:00 | 14h | 4,221 | 8,584 |
| 9 | May 26, 2021 12:45 | May 27, 2021 06:15 | 17h 30m | 3,486 | 5,957 |
| 10 | June 24, 2021 04:30 | June 24, 2021 22:45 | 18h 15m | 3,011 | 13K |
Outage episodes by size in 2021: 123 reached 100+ customers, 42 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 Delaware 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 Power Co | 2021 | 3.9 hrs | 1.36 | 2.9 hrs | 1.26 |
| 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 |
| Licking Rural Electric Inc | 2021 | 3.6 hrs | 2.06 | 2.0 hrs | 1.52 |
| Consolidated Cooperative | 2021 | 2.4 hrs | 1.66 | 1.6 hrs | 1.33 |
| Union Rural Electric Coop, Inc | 2021 | 2.9 hrs | 1.78 | 48 min | 0.93 |
| City of Westerville - (OH) | 2021 | 49 min | 0.64 | 33 min | 0.57 |
| Prospect 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 ÷ 64,488 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. Delaware County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Delaware 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/delaware-county