County annual report · FIPS 40039
2021 Custer County, OK Power Outage Report
In 2021, customers in Custer County, OK went without power for an average of 4.2 hours, a total of 64K customer-hours (Oklahoma average 3.2 hours). That ranks 30th worst of 77 Oklahoma counties and 1502nd 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 Custer 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 13, 2021 01:00 | October 13, 2021 22:15 | 21h 15m | 5,684 | 19K |
| 2 | April 10, 2021 00:15 | April 10, 2021 01:00 | 45m | 2,311 | 976 |
| 3 | July 29, 2021 06:30 | July 29, 2021 08:45 | 2h 15m | 2,038 | 3,998 |
| 4 | February 16, 2021 13:15 | February 16, 2021 17:15 | 4h | 2,007 | 3,052 |
| 5 | February 6, 2021 01:45 | February 6, 2021 03:45 | 2h | 1,592 | 2,298 |
| 6 | June 24, 2021 15:45 | June 24, 2021 22:00 | 6h 15m | 1,278 | 717 |
| 7 | June 10, 2021 14:15 | June 10, 2021 17:45 | 3h 30m | 1,185 | 722 |
| 8 | February 14, 2021 07:00 | February 14, 2021 10:00 | 3h | 1,092 | 1,102 |
| 9 | July 29, 2021 17:00 | July 29, 2021 19:30 | 2h 30m | 1,062 | 802 |
| 10 | August 13, 2021 21:45 | August 14, 2021 06:15 | 8h 30m | 1,029 | 2,563 |
Outage episodes by size in 2021: 56 reached 100+ customers, 10 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 Custer 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 |
| Cimarron Electric Coop | 2021 | 1.6 hrs | 1.07 | 44 min | 0.56 |
| Northfork Electric Coop, Inc | 2018 | 3.7 hrs | - | 2.7 hrs | - |
| Oklahoma Gas & Electric Co | - | - | - | - | - |
| CKenergy 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 ÷ 15,341 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. Custer County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Custer 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/custer-county