County annual report · FIPS 48181
2021 Grayson County, TX Power Outage Report
In 2021, customers in Grayson County, TX went without power for an average of 15.8 hours, a total of 828K customer-hours (Texas average 21.0 hours). That ranks 164th worst of 252 Texas counties and 541st of 2,974 nationally.
Compared with TX, the US and 2020
Coverage line is EAGLE-I's share of Texas customers tracked each year.
Biggest outages in Grayson 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 14, 2021 10:00 | February 19, 2021 01:30 | 4d 15h | 19,236 | 687K |
| 2 | September 13, 2021 13:45 | September 13, 2021 20:15 | 6h 30m | 17,172 | 9,175 |
| 3 | October 10, 2021 16:45 | October 12, 2021 01:30 | 1d 8h | 2,546 | 5,472 |
| 4 | August 17, 2021 11:30 | August 18, 2021 04:00 | 16h 30m | 2,451 | 3,131 |
| 5 | August 18, 2021 13:00 | August 19, 2021 03:30 | 14h 30m | 1,990 | 2,807 |
| 6 | December 14, 2021 06:15 | December 14, 2021 06:45 | 30m | 1,951 | 508 |
| 7 | July 2, 2021 04:15 | July 2, 2021 04:45 | 30m | 1,939 | 875 |
| 8 | October 28, 2021 12:00 | October 30, 2021 17:45 | 2d 5h | 1,888 | 11K |
| 9 | May 3, 2021 21:30 | May 5, 2021 05:30 | 1d 8h | 1,706 | 25K |
| 10 | November 19, 2021 06:00 | November 19, 2021 06:30 | 30m | 1,571 | 394 |
Outage episodes by size in 2021: 95 reached 100+ customers, 15 reached 1,000+ customers, 2 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 Grayson 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 |
|---|---|---|---|---|---|
| Oncor Electric Delivery Company LLC | 2017 | 3.4 hrs | 1.69 | 2.4 hrs | 1.49 |
| Denton County Elec Coop, Inc | 2021 | 17.2 hrs | - | 41 min | 0.63 |
| Cooke County Elec Coop Assn | 2021 | 1.8 hrs | 1.06 | 1.8 hrs | - |
| Grayson-Collin Elec Coop, Inc | 2013 | 5.2 hrs | - | 2.1 hrs | - |
| Texas-New Mexico Power Co | - | - | - | - | - |
| Fannin County Electric Coop | - | - | - | - | - |
| City of Whitesboro - (TX) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 94% of Texas's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 52,508 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. Grayson County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Grayson County, TX 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/texas/grayson-county