County annual report · FIPS 39061
2021 Hamilton County, OH Power Outage Report
In 2021, customers in Hamilton County, OH went without power for an average of 2.2 hours, a total of 972K customer-hours (Ohio average 4.2 hours). That ranks 73rd worst of 88 Ohio counties and 2140th 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 Hamilton 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 19, 2021 10:30 | October 20, 2021 10:00 | 23h 30m | 20,578 | 16K |
| 2 | June 18, 2021 11:15 | June 22, 2021 06:15 | 3d 19h | 11,618 | 102K |
| 3 | February 28, 2021 13:15 | March 2, 2021 06:15 | 1d 17h | 10,571 | 17K |
| 4 | October 4, 2021 03:45 | October 4, 2021 07:15 | 3h 30m | 10,308 | 6,424 |
| 5 | April 3, 2021 20:45 | April 4, 2021 02:30 | 5h 45m | 8,041 | 2,056 |
| 6 | June 29, 2021 09:45 | July 5, 2021 00:45 | 5d 15h | 6,940 | 81K |
| 7 | May 23, 2021 21:00 | May 25, 2021 09:45 | 1d 12h | 5,969 | 8,586 |
| 8 | May 6, 2021 12:15 | May 8, 2021 05:15 | 1d 17h | 5,489 | 8,501 |
| 9 | April 8, 2021 12:00 | April 9, 2021 23:00 | 1d 11h | 5,401 | 14K |
| 10 | May 25, 2021 10:45 | May 26, 2021 09:30 | 22h 45m | 4,318 | 5,106 |
Outage episodes by size in 2021: 280 reached 100+ customers, 101 reached 1,000+ customers, 4 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 Hamilton 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 |
|---|---|---|---|---|---|
| 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 |
| 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 ÷ 437,530 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. Hamilton County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Hamilton 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/hamilton-county