County annual report · FIPS 48425
2021 Somervell County, TX Power Outage Report
In 2021, customers in Somervell County, TX went without power for an average of 29.6 hours, a total of 159K customer-hours (Texas average 21.0 hours). That ranks 97th worst of 252 Texas counties and 299th 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 Somervell 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 | August 25, 2021 21:00 | August 25, 2021 21:15 | 15m | 3,075 | 769 |
| 2 | February 15, 2021 07:45 | February 18, 2021 22:00 | 3d 14h | 2,914 | 123K |
| 3 | June 21, 2021 13:30 | June 21, 2021 15:00 | 1h 30m | 1,314 | 1,512 |
| 4 | October 11, 2021 02:15 | October 11, 2021 10:45 | 8h 30m | 1,232 | 6,532 |
| 5 | August 18, 2021 20:30 | August 19, 2021 16:30 | 20h | 946 | 2,506 |
| 6 | June 13, 2021 04:15 | June 13, 2021 08:00 | 3h 45m | 768 | 213 |
| 7 | October 13, 2021 06:00 | October 13, 2021 08:00 | 2h | 751 | 1,502 |
| 8 | May 31, 2021 21:15 | June 1, 2021 06:30 | 9h 15m | 686 | 2,368 |
| 9 | October 28, 2021 16:30 | October 29, 2021 03:45 | 11h 15m | 684 | 1,071 |
| 10 | May 28, 2021 19:15 | May 29, 2021 08:45 | 13h 30m | 676 | 4,288 |
Outage episodes by size in 2021: 19 reached 100+ customers, 4 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 Somervell 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 |
| United Electric Coop Service Inc - (TX) | 2021 | 13.5 hrs | - | 3.1 hrs | 2.07 |
| Texas-New Mexico Power Co | - | - | - | - | - |
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 ÷ 5,351 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. Somervell County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Somervell 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/somervell-county