County annual report · FIPS 40021
2021 Cherokee County, OK Power Outage Report
In 2021, customers in Cherokee County, OK went without power for an average of 1.0 hours, a total of 29K customer-hours (Oklahoma average 3.2 hours). That ranks 70th worst of 77 Oklahoma counties and 2645th 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 Cherokee 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 | August 21, 2021 19:45 | August 21, 2021 22:30 | 2h 45m | 1,487 | 2,463 |
| 2 | October 21, 2021 16:30 | October 21, 2021 19:15 | 2h 45m | 806 | 204 |
| 3 | November 1, 2021 15:15 | November 1, 2021 15:30 | 15m | 554 | 139 |
| 4 | March 5, 2021 15:30 | March 5, 2021 17:45 | 2h 15m | 550 | 1,104 |
| 5 | November 3, 2021 02:00 | November 3, 2021 13:15 | 11h 15m | 432 | 1,575 |
| 6 | November 2, 2021 22:45 | November 3, 2021 01:15 | 2h 30m | 428 | 666 |
| 7 | June 14, 2021 16:45 | June 14, 2021 21:45 | 5h | 393 | 1,105 |
| 8 | June 12, 2021 20:00 | June 13, 2021 00:15 | 4h 15m | 384 | 893 |
| 9 | December 17, 2021 15:15 | December 20, 2021 14:30 | 2d 23h | 366 | 2,008 |
| 10 | May 12, 2021 14:45 | May 12, 2021 16:00 | 1h 15m | 207 | 156 |
Outage episodes by size in 2021: 24 reached 100+ customers, 1 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 Cherokee 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 |
|---|---|---|---|---|---|
| Public Service Co of Oklahoma | 2021 | 2.3 hrs | 1.39 | 1.9 hrs | 1.21 |
| 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 |
| Lake Region Electric Coop, Inc - (OK) | 2021 | 2.2 hrs | 1.09 | 1.9 hrs | 0.99 |
| Oklahoma Gas & Electric Co | - | - | - | - | - |
| Northeast Oklahoma Electric Co | - | - | - | - | - |
| Tahlequah Public Works Authority | - | - | - | - | - |
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 ÷ 27,388 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. Cherokee County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Cherokee 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/cherokee-county