County annual report · FIPS 48099
2021 Coryell County, TX Power Outage Report
In 2021, customers in Coryell County, TX went without power for an average of 39.4 hours, a total of 1.0M customer-hours (Texas average 21.0 hours). That ranks 80th worst of 252 Texas counties and 222nd 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 Coryell 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 13, 2021 13:00 | February 22, 2021 13:30 | 9d | 15,160 | 981K |
| 2 | April 15, 2021 21:30 | April 16, 2021 22:45 | 1d 1h | 4,539 | 8,356 |
| 3 | June 17, 2021 17:45 | June 17, 2021 20:00 | 2h 15m | 2,270 | 587 |
| 4 | January 10, 2021 16:00 | January 11, 2021 05:30 | 13h 30m | 1,616 | 10K |
| 5 | October 28, 2021 13:45 | October 30, 2021 06:30 | 1d 16h | 1,105 | 8,602 |
| 6 | June 28, 2021 21:30 | June 29, 2021 00:15 | 2h 45m | 1,012 | 1,259 |
| 7 | June 4, 2021 23:00 | June 5, 2021 09:30 | 10h 30m | 677 | 1,556 |
| 8 | May 30, 2021 06:30 | May 30, 2021 08:00 | 1h 30m | 534 | 669 |
| 9 | May 17, 2021 16:30 | May 18, 2021 10:00 | 17h 30m | 400 | 1,594 |
| 10 | August 18, 2021 06:45 | August 18, 2021 11:45 | 5h | 398 | 681 |
Outage episodes by size in 2021: 36 reached 100+ customers, 6 reached 1,000+ customers, 1 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 Coryell 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 |
| Heart of Texas Electric Coop | 2021 | 14.1 hrs | 2.22 | 7.1 hrs | 1.93 |
| Texas-New Mexico Power Co | - | - | - | - | - |
| Hamilton County Elec Coop Assn | - | - | - | - | - |
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 ÷ 26,485 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. Coryell County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Coryell 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/coryell-county