County annual report · FIPS 48111
2021 Dallam County, TX Power Outage Report
In 2021, customers in Dallam County, TX went without power for an average of 15.5 hours, a total of 20K customer-hours (Texas average 21.0 hours). That ranks 167th worst of 252 Texas counties and 554th 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 Dallam 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 | January 14, 2021 01:15 | January 14, 2021 02:45 | 1h 30m | 860 | 1,075 |
| 2 | January 21, 2021 01:30 | January 21, 2021 17:30 | 16h | 860 | 14K |
| 3 | February 22, 2021 16:30 | February 22, 2021 17:00 | 30m | 406 | 203 |
| 4 | April 20, 2021 13:30 | April 20, 2021 15:30 | 2h | 239 | 354 |
| 5 | December 15, 2021 16:45 | December 16, 2021 05:30 | 12h 45m | 179 | 607 |
| 6 | January 30, 2021 11:30 | January 30, 2021 23:00 | 11h 30m | 134 | 678 |
| 7 | May 16, 2021 22:30 | May 17, 2021 05:15 | 6h 45m | 128 | 188 |
| 8 | March 13, 2021 06:30 | March 13, 2021 09:00 | 2h 30m | 127 | 318 |
| 9 | December 22, 2021 18:45 | December 22, 2021 19:45 | 1h | 127 | 74 |
| 10 | June 8, 2021 22:00 | June 9, 2021 04:15 | 6h 15m | 98 | 555 |
Outage episodes by size in 2021: 9 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 Dallam 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 |
|---|---|---|---|---|---|
| Southwestern Public Service Co | 2021 | 3.2 hrs | 1.75 | 2.0 hrs | 1.07 |
| Tri-County Electric Coop, Inc (OK) | - | - | - | - | - |
| Rita Blanca Electric Coop, Inc | - | - | - | - | - |
| Southwestern Electric Coop Inc - (NM) | - | - | - | - | - |
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 ÷ 1,292 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. Dallam County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Dallam 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/dallam-county