County annual report · FIPS 40069
2018 Johnston County, OK Power Outage Report
In 2018, customers in Johnston County, OK went without power for an average of 5.8 hours, a total of 41K customer-hours (Oklahoma average 2.7 hours). That ranks 20th worst of 77 Oklahoma counties and 941st of 2,798 nationally.
Compared with OK, the US and 2017
Coverage line is EAGLE-I's share of Oklahoma customers tracked each year.
Biggest outages in Johnston County, 2018
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 21, 2018 21:30 | February 26, 2018 04:00 | 4d 6h | 1,028 | 23K |
| 2 | March 15, 2018 17:30 | March 15, 2018 19:00 | 1h 30m | 737 | 686 |
| 3 | December 1, 2018 03:15 | December 1, 2018 18:00 | 14h 45m | 522 | 3,347 |
| 4 | January 17, 2018 12:45 | January 17, 2018 22:15 | 9h 30m | 503 | 3,494 |
| 5 | May 24, 2018 19:30 | May 24, 2018 21:15 | 1h 45m | 502 | 262 |
| 6 | September 24, 2018 17:45 | September 24, 2018 19:00 | 1h 15m | 502 | 628 |
| 7 | November 12, 2018 15:30 | November 12, 2018 17:45 | 2h 15m | 500 | 1,125 |
| 8 | October 7, 2018 21:00 | October 8, 2018 01:30 | 4h 30m | 485 | 746 |
| 9 | November 21, 2018 22:00 | November 21, 2018 23:45 | 1h 45m | 455 | 395 |
| 10 | May 26, 2018 20:30 | May 26, 2018 21:15 | 45m | 365 | 190 |
Outage episodes by size in 2018: 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 Johnston County reported on EIA Form 861 for 2018, 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 | 2018 | 2.1 hrs | 1.34 | 1.7 hrs | 1.17 |
| Southeastern Electric Coop Inc - (OK) | 2018 | 9.6 hrs | 6.00 | 4.0 hrs | 1.90 |
| 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 89% of Oklahoma's customers in 2018; 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, 2018, 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/2018/oklahoma/johnston-county