County annual report · FIPS 48299
2021 Llano County, TX Power Outage Report
In 2021, customers in Llano County, TX went without power for an average of 96.8 hours, a total of 952K customer-hours (Texas average 21.0 hours). That ranks 30th worst of 252 Texas counties and 84th 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 Llano 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 11, 2021 13:45 | March 5, 2021 14:45 | 22d 1h | 16,499 | 904K |
| 2 | September 20, 2021 21:45 | September 20, 2021 22:30 | 45m | 2,478 | 806 |
| 3 | June 3, 2021 00:30 | June 7, 2021 12:15 | 4d 11h | 2,020 | 5,548 |
| 4 | May 28, 2021 21:00 | May 29, 2021 21:00 | 1d | 2,013 | 2,484 |
| 5 | July 13, 2021 14:15 | July 13, 2021 15:00 | 45m | 1,747 | 875 |
| 6 | March 23, 2021 13:30 | March 23, 2021 23:00 | 9h 30m | 1,741 | 2,422 |
| 7 | November 9, 2021 15:15 | November 9, 2021 19:00 | 3h 45m | 1,739 | 6,518 |
| 8 | April 29, 2021 06:30 | April 29, 2021 16:15 | 9h 45m | 1,103 | 2,662 |
| 9 | September 23, 2021 13:30 | September 24, 2021 12:15 | 22h 45m | 1,012 | 791 |
| 10 | August 16, 2021 19:15 | August 16, 2021 21:00 | 1h 45m | 1,009 | 1,262 |
Outage episodes by size in 2021: 40 reached 100+ customers, 11 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 Llano 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 |
|---|---|---|---|---|---|
| Pedernales Electric Coop, Inc | 2021 | 2.5 hrs | 1.13 | 84 min | 1.13 |
| Central Texas Elec Coop, Inc | 2021 | 137.5 hrs | 3.94 | 52.5 hrs | 2.54 |
| Hamilton County Elec Coop Assn | - | - | - | - | - |
| City of Llano - (TX) | - | - | - | - | - |
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 ÷ 9,838 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. Llano County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Llano 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/llano-county