County annual report · FIPS 40069
2021 Johnston County, OK Power Outage Report
In 2021, customers in Johnston County, OK went without power for an average of 4.5 hours, a total of 31K customer-hours (Oklahoma average 3.2 hours). That ranks 27th worst of 77 Oklahoma counties and 1444th 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 Johnston 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 16, 2021 13:30 | February 17, 2021 00:45 | 11h 15m | 1,221 | 8,594 |
| 2 | October 28, 2021 16:30 | October 29, 2021 01:15 | 8h 45m | 1,183 | 1,096 |
| 3 | October 27, 2021 19:30 | October 27, 2021 22:15 | 2h 45m | 702 | 969 |
| 4 | March 22, 2021 22:15 | March 23, 2021 06:30 | 8h 15m | 607 | 3,207 |
| 5 | August 31, 2021 05:30 | August 31, 2021 14:15 | 8h 45m | 516 | 915 |
| 6 | July 24, 2021 14:45 | July 24, 2021 19:15 | 4h 30m | 459 | 1,387 |
| 7 | March 7, 2021 08:15 | March 7, 2021 13:00 | 4h 45m | 458 | 1,842 |
| 8 | October 15, 2021 07:45 | October 15, 2021 11:00 | 3h 15m | 353 | 1,147 |
| 9 | October 28, 2021 01:00 | October 28, 2021 02:30 | 1h 30m | 351 | 527 |
| 10 | December 11, 2021 05:00 | December 11, 2021 05:15 | 15m | 351 | 88 |
Outage episodes by size in 2021: 26 reached 100+ customers, 2 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 Johnston 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 |
| Southeastern Electric Coop Inc - (OK) | 2021 | 7.0 hrs | 1.50 | 3.5 hrs | 1.40 |
| Oklahoma Gas & Electric Co | - | - | - | - | - |
| People's Electric Cooperative | - | - | - | - | - |
| Red River Valley Rrl Elec Assn | - | - | - | - | - |
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 ÷ 7,045 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. Johnston County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Johnston 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/johnston-county