County annual report · FIPS 48173
2021 Glasscock County, TX Power Outage Report
In 2021, customers in Glasscock County, TX went without power for an average of 145.1 hours, a total of 135K customer-hours (Texas average 21.0 hours). That ranks 13th worst of 252 Texas counties and 42nd 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 Glasscock 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 04:00 | February 21, 2021 04:45 | 7d | 3,043 | 106K |
| 2 | April 4, 2021 13:45 | April 4, 2021 18:15 | 4h 30m | 613 | 1,547 |
| 3 | February 4, 2021 14:30 | February 4, 2021 17:45 | 3h 15m | 561 | 1,542 |
| 4 | May 1, 2021 08:15 | May 1, 2021 23:30 | 15h 15m | 488 | 519 |
| 5 | April 15, 2021 13:00 | April 15, 2021 19:15 | 6h 15m | 475 | 956 |
| 6 | June 10, 2021 11:45 | June 11, 2021 01:15 | 13h 30m | 465 | 174 |
| 7 | September 12, 2021 19:15 | September 12, 2021 23:15 | 4h | 456 | 242 |
| 8 | August 19, 2021 09:30 | August 21, 2021 04:45 | 1d 19h | 434 | 1,084 |
| 9 | August 24, 2021 15:45 | August 27, 2021 12:45 | 2d 21h | 416 | 583 |
| 10 | July 3, 2021 06:30 | July 4, 2021 09:30 | 1d 3h | 344 | 1,846 |
Outage episodes by size in 2021: 36 reached 100+ customers, 1 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 Glasscock 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 |
| 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 ÷ 931 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. Glasscock County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Glasscock 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/glasscock-county