County annual report · FIPS 48085
2021 Collin County, TX Power Outage Report
In 2021, customers in Collin County, TX went without power for an average of 17.2 hours, a total of 7.2M customer-hours (Texas average 21.0 hours). That ranks 155th worst of 252 Texas counties and 496th 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 Collin 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 14:45 | February 22, 2021 12:15 | 7d 21h | 143,803 | 6.3M |
| 2 | October 10, 2021 20:45 | October 13, 2021 04:15 | 2d 7h | 12,286 | 56K |
| 3 | March 13, 2021 03:45 | March 13, 2021 04:45 | 1h | 11,124 | 4,594 |
| 4 | October 28, 2021 08:15 | October 30, 2021 09:30 | 2d 1h | 9,311 | 65K |
| 5 | February 24, 2021 22:45 | February 27, 2021 06:30 | 2d 7h | 9,062 | 14K |
| 6 | January 4, 2021 11:45 | January 5, 2021 11:15 | 23h 30m | 8,920 | 11K |
| 7 | January 15, 2021 14:15 | January 16, 2021 11:00 | 20h 45m | 8,164 | 20K |
| 8 | January 27, 2021 11:15 | January 27, 2021 18:00 | 6h 45m | 6,307 | 4,730 |
| 9 | June 7, 2021 11:45 | June 13, 2021 03:45 | 5d 16h | 6,300 | 26K |
| 10 | July 1, 2021 11:15 | July 3, 2021 12:00 | 2d | 5,911 | 26K |
Outage episodes by size in 2021: 223 reached 100+ customers, 96 reached 1,000+ customers, 3 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 Collin 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 |
| Farmers Electric Coop, Inc - (TX) | 2021 | 13.2 hrs | - | 52 min | 0.86 |
| Denton County Elec Coop, Inc | 2021 | 17.2 hrs | - | 41 min | 0.63 |
| Grayson-Collin Elec Coop, Inc | 2013 | 5.2 hrs | - | 2.1 hrs | - |
| Texas-New Mexico Power Co | - | - | - | - | - |
| Fannin County Electric Coop | - | - | - | - | - |
| City of Farmersville - (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 ÷ 417,242 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. Collin County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Collin 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/collin-county