County annual report · FIPS 40043
2021 Dewey County, OK Power Outage Report
In 2021, customers in Dewey County, OK went without power for an average of 5.8 hours, a total of 15K customer-hours (Oklahoma average 3.2 hours). That ranks 14th worst of 77 Oklahoma counties and 1174th 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 Dewey 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 | July 9, 2021 08:15 | July 9, 2021 09:45 | 1h 30m | 1,121 | 1,682 |
| 2 | July 18, 2021 20:30 | July 19, 2021 02:45 | 6h 15m | 748 | 1,276 |
| 3 | January 1, 2021 12:00 | January 1, 2021 14:00 | 2h | 610 | 500 |
| 4 | February 12, 2021 06:00 | February 12, 2021 08:45 | 2h 45m | 370 | 814 |
| 5 | November 2, 2021 23:30 | November 3, 2021 04:15 | 4h 45m | 363 | 1,643 |
| 6 | March 15, 2021 14:15 | March 15, 2021 16:30 | 2h 15m | 343 | 689 |
| 7 | May 7, 2021 10:45 | May 7, 2021 15:30 | 4h 45m | 342 | 1,623 |
| 8 | June 15, 2021 15:00 | June 15, 2021 15:45 | 45m | 337 | 253 |
| 9 | October 14, 2021 23:45 | October 15, 2021 01:45 | 2h | 334 | 595 |
| 10 | March 23, 2021 07:00 | March 23, 2021 08:30 | 1h 30m | 330 | 413 |
Outage episodes by size in 2021: 20 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 Dewey 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 | - | - | - | - | - |
| Northwestern Electric Coop Inc - (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 ÷ 2,623 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. Dewey County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dewey 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/dewey-county