County annual report · FIPS 39041
2025 Delaware County, OH Power Outage Report
In 2025, customers in Delaware County, OH went without power for an average of 4.2 hours, a total of 273K customer-hours (Ohio average 4.0 hours). That ranks 38th worst of 88 Ohio counties and 1702nd of 3,000 nationally.
Compared with OH, the US and 2024
Coverage line is EAGLE-I's share of Ohio customers tracked each year.
Biggest outages in Delaware County, 2025
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 28, 2025 12:15 | May 1, 2025 06:15 | 2d 18h | 5,614 | 15K |
| 2 | November 21, 2025 12:45 | November 21, 2025 19:30 | 6h 45m | 4,690 | 8,233 |
| 3 | May 7, 2025 12:30 | May 7, 2025 22:45 | 10h 15m | 3,925 | 2,013 |
| 4 | March 20, 2025 11:30 | March 20, 2025 20:30 | 9h | 3,666 | 4,632 |
| 5 | July 12, 2025 20:15 | July 14, 2025 00:15 | 1d 4h | 3,326 | 15K |
| 6 | June 18, 2025 12:30 | June 20, 2025 06:30 | 1d 18h | 2,760 | 14K |
| 7 | December 13, 2025 01:15 | December 13, 2025 05:15 | 4h | 2,639 | 1,964 |
| 8 | February 28, 2025 18:15 | March 1, 2025 08:00 | 13h 45m | 2,555 | 7,523 |
| 9 | September 19, 2025 12:30 | September 19, 2025 18:45 | 6h 15m | 2,515 | 3,172 |
| 10 | April 23, 2025 13:00 | April 24, 2025 02:45 | 13h 45m | 2,504 | 3,196 |
Outage episodes by size in 2025: 122 reached 100+ customers, 36 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 2025, 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 | 2024 | 4.5 hrs | 1.13 | 2.6 hrs | 0.99 |
| Ohio Edison Co | 2024 | 3.9 hrs | 1.28 | 1.9 hrs | 1.03 |
| Dayton Power & Light Co | 2024 | 8.4 hrs | 1.26 | 1.8 hrs | 0.87 |
| Duke Energy Ohio Inc | 2024 | 5.4 hrs | 1.04 | 1.7 hrs | 0.80 |
| Licking Rural Electric Inc | 2024 | 4.0 hrs | 1.64 | 1.9 hrs | 1.04 |
| Consolidated Cooperative | 2024 | 5.9 hrs | 1.23 | 87 min | 0.93 |
| Union Rural Electric Coop, Inc | 2024 | 4.3 hrs | 2.11 | 59 min | 0.48 |
| City of Westerville - (OH) | 2024 | 57 min | 0.85 | 21 min | 0.35 |
| 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 n/a of Ohio's customers in 2025; 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, 2025, 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/2025/ohio/delaware-county