County annual report · FIPS 48431
2021 Sterling County, TX Power Outage Report
In 2021, customers in Sterling County, TX went without power for an average of 62.8 hours, a total of 75K customer-hours (Texas average 21.0 hours). That ranks 48th worst of 252 Texas counties and 133rd 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 Sterling 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 12, 2021 17:00 | March 23, 2021 13:00 | 38d 20h | 967 | 45K |
| 2 | October 6, 2021 20:15 | October 6, 2021 22:45 | 2h 30m | 870 | 2,100 |
| 3 | January 9, 2021 09:15 | January 11, 2021 00:45 | 1d 15h | 852 | 5,039 |
| 4 | September 20, 2021 19:30 | September 20, 2021 21:15 | 1h 45m | 852 | 669 |
| 5 | August 14, 2021 20:30 | August 27, 2021 12:45 | 12d 16h | 822 | 1,811 |
| 6 | October 27, 2021 03:30 | November 1, 2021 19:15 | 5d 15h | 348 | 3,317 |
| 7 | January 22, 2021 08:45 | January 26, 2021 18:30 | 4d 9h | 347 | 1,424 |
| 8 | December 6, 2021 09:15 | December 6, 2021 17:15 | 8h | 314 | 2,041 |
| 9 | May 28, 2021 00:00 | June 9, 2021 05:15 | 12d 5h | 303 | 3,408 |
| 10 | July 31, 2021 11:45 | August 1, 2021 09:30 | 21h 45m | 171 | 574 |
Outage episodes by size in 2021: 18 reached 100+ customers, 0 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 Sterling 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 |
| AEP Texas North Company | 2021 | 18.9 hrs | 2.72 | 1.9 hrs | 1.24 |
| Concho Valley Elec Coop Inc | 2021 | 13.5 hrs | 3.90 | 9.1 hrs | 2.99 |
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 ÷ 1,197 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. Sterling County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Sterling 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/sterling-county