County annual report · FIPS 40051
2021 Grady County, OK Power Outage Report
In 2021, customers in Grady County, OK went without power for an average of 5.3 hours, a total of 133K customer-hours (Oklahoma average 3.2 hours). That ranks 19th worst of 77 Oklahoma counties and 1270th 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 Grady 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 8, 2021 20:15 | October 13, 2021 00:45 | 4d 4h | 10,204 | 37K |
| 2 | June 12, 2021 07:00 | June 13, 2021 07:45 | 1d | 4,990 | 19K |
| 3 | September 5, 2021 03:45 | September 5, 2021 04:45 | 1h | 3,821 | 3,821 |
| 4 | May 28, 2021 01:00 | May 28, 2021 16:30 | 15h 30m | 3,796 | 4,058 |
| 5 | August 6, 2021 13:30 | August 6, 2021 19:30 | 6h | 3,403 | 1,722 |
| 6 | November 5, 2021 20:15 | November 5, 2021 20:30 | 15m | 2,816 | 704 |
| 7 | August 7, 2021 02:45 | August 7, 2021 04:15 | 1h 30m | 2,394 | 1,798 |
| 8 | April 29, 2021 01:15 | April 29, 2021 12:45 | 11h 30m | 2,010 | 5,127 |
| 9 | July 26, 2021 02:15 | July 26, 2021 20:00 | 17h 45m | 1,789 | 2,475 |
| 10 | June 22, 2021 00:45 | June 22, 2021 02:30 | 1h 45m | 1,738 | 887 |
Outage episodes by size in 2021: 52 reached 100+ customers, 18 reached 1,000+ customers, 1 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 Grady 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 |
| Cotton Electric Coop, Inc | 2021 | 3.5 hrs | 2.32 | 2.8 hrs | 1.79 |
| Oklahoma Electric Coop Inc | 2021 | 2.6 hrs | 2.12 | 71 min | 1.44 |
| Rural Electric Coop, Inc - (OK) | 2021 | 5.2 hrs | 2.89 | 3.9 hrs | 2.24 |
| Oklahoma Gas & Electric Co | - | - | - | - | - |
| CKenergy Electric Cooperative | - | - | - | - | - |
| City of Marlow - (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 ÷ 24,938 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. Grady County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Grady 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/grady-county