County annual report · FIPS 40133
2021 Seminole County, OK Power Outage Report
In 2021, customers in Seminole County, OK went without power for an average of 4.7 hours, a total of 64K customer-hours (Oklahoma average 3.2 hours). That ranks 23rd worst of 77 Oklahoma counties and 1393rd of 2,974 nationally.
Compared with OK, the US and 2020
Coverage line is EAGLE-I's share of Oklahoma customers tracked each year.
Biggest outages in Seminole 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 28, 2021 17:30 | October 29, 2021 18:00 | 1d | 2,498 | 13K |
| 2 | May 17, 2021 18:15 | May 18, 2021 00:30 | 6h 15m | 2,062 | 3,487 |
| 3 | December 14, 2021 14:00 | December 14, 2021 17:00 | 3h | 1,613 | 4,525 |
| 4 | July 11, 2021 04:15 | July 11, 2021 12:00 | 7h 45m | 1,508 | 2,675 |
| 5 | February 16, 2021 12:30 | February 16, 2021 20:15 | 7h 45m | 1,236 | 4,082 |
| 6 | February 15, 2021 08:15 | February 15, 2021 13:15 | 5h | 1,151 | 3,924 |
| 7 | June 21, 2021 16:15 | June 21, 2021 21:00 | 4h 45m | 1,048 | 2,437 |
| 8 | July 29, 2021 23:00 | July 30, 2021 02:45 | 3h 45m | 781 | 2,743 |
| 9 | September 28, 2021 13:00 | September 28, 2021 16:45 | 3h 45m | 678 | 754 |
| 10 | September 5, 2021 01:45 | September 5, 2021 10:15 | 8h 30m | 664 | 698 |
Outage episodes by size in 2021: 44 reached 100+ customers, 7 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 Seminole 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 |
|---|---|---|---|---|---|
| Canadian Valley Elec Coop, Inc | 2021 | 4.9 hrs | 1.60 | 3.2 hrs | 1.16 |
| East Central Oklahoma Elec Coop Inc | 2021 | 3.3 hrs | 1.73 | 3.3 hrs | 1.73 |
| Oklahoma Gas & Electric Co | - | - | - | - | - |
| People's Electric Cooperative | - | - | - | - | - |
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 Oklahoma's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 13,650 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. Seminole County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Seminole County, OK 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/oklahoma/seminole-county