County annual report · FIPS 40135
2021 Sequoyah County, OK Power Outage Report
In 2021, customers in Sequoyah County, OK went without power for an average of 2.7 hours, a total of 92K customer-hours (Oklahoma average 3.2 hours). That ranks 50th worst of 77 Oklahoma counties and 1943rd 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 Sequoyah 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 | February 15, 2021 08:00 | February 17, 2021 02:30 | 1d 18h | 3,387 | 21K |
| 2 | May 4, 2021 02:30 | May 7, 2021 02:30 | 3d | 2,731 | 32K |
| 3 | August 19, 2021 20:15 | August 19, 2021 22:00 | 1h 45m | 1,151 | 1,257 |
| 4 | July 16, 2021 14:45 | July 16, 2021 16:15 | 1h 30m | 1,143 | 437 |
| 5 | July 19, 2021 21:45 | July 20, 2021 21:15 | 23h 30m | 912 | 1,345 |
| 6 | June 13, 2021 13:15 | June 13, 2021 14:00 | 45m | 801 | 600 |
| 7 | July 9, 2021 11:30 | July 9, 2021 18:45 | 7h 15m | 786 | 3,325 |
| 8 | December 17, 2021 14:00 | December 18, 2021 10:30 | 20h 30m | 771 | 7,852 |
| 9 | May 17, 2021 13:45 | May 17, 2021 16:45 | 3h | 629 | 386 |
| 10 | November 11, 2021 15:00 | November 11, 2021 16:30 | 1h 30m | 573 | 734 |
Outage episodes by size in 2021: 41 reached 100+ customers, 4 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 Sequoyah 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 |
|---|---|---|---|---|---|
| Arkansas Valley Elec Coop Corp | 2021 | 6.0 hrs | 2.06 | 2.8 hrs | 1.88 |
| Ozarks Electric Coop Corp - (AR) | 2021 | 86 min | 1.06 | 49 min | 0.80 |
| Cookson Hills Elec Coop, Inc | 2021 | 2.0 hrs | 0.81 | 1.8 hrs | 0.78 |
| Oklahoma Gas & Electric Co | - | - | - | - | - |
| City of Sallisaw - (OK) | - | - | - | - | - |
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 ÷ 33,532 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. Sequoyah County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Sequoyah 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/sequoyah-county