County annual report · FIPS 48451
2021 Tom Green County, TX Power Outage Report
In 2021, customers in Tom Green County, TX went without power for an average of 29.2 hours, a total of 1.7M customer-hours (Texas average 21.0 hours). That ranks 100th worst of 252 Texas counties and 306th 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 Tom Green 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 10, 2021 14:00 | February 25, 2021 22:00 | 15d 8h | 28,680 | 1.5M |
| 2 | August 15, 2021 10:30 | September 1, 2021 23:45 | 17d 13h | 21,676 | 36K |
| 3 | January 19, 2021 13:45 | February 10, 2021 00:45 | 21d 11h | 11,996 | 37K |
| 4 | March 27, 2021 13:30 | April 7, 2021 21:30 | 11d 8h | 11,001 | 14K |
| 5 | September 22, 2021 13:30 | September 22, 2021 21:00 | 7h 30m | 8,217 | 2,423 |
| 6 | June 9, 2021 06:00 | August 5, 2021 22:15 | 57d 16h | 5,084 | 31K |
| 7 | August 13, 2021 12:30 | August 14, 2021 11:15 | 22h 45m | 4,698 | 9,400 |
| 8 | April 8, 2021 13:00 | April 14, 2021 01:15 | 5d 12h | 4,406 | 12K |
| 9 | May 11, 2021 14:15 | June 9, 2021 05:15 | 28d 15h | 4,140 | 17K |
| 10 | April 14, 2021 14:15 | April 27, 2021 13:30 | 12d 23h | 3,460 | 8,416 |
Outage episodes by size in 2021: 41 reached 100+ customers, 18 reached 1,000+ customers, 4 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 Tom Green 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 Central Company | 2021 | 31.7 hrs | 3.36 | 3.1 hrs | 1.61 |
| 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 |
| Southwest Texas Elec Coop, Inc | - | - | - | - | - |
| Coleman County Elec Coop, Inc | - | - | - | - | - |
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 ÷ 58,381 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. Tom Green County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Tom Green 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/tom-green-county