County annual report · FIPS 48309
2021 McLennan County, TX Power Outage Report
In 2021, customers in McLennan County, TX went without power for an average of 23.9 hours, a total of 2.4M customer-hours (Texas average 21.0 hours). That ranks 120th worst of 252 Texas counties and 354th 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 McLennan 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 14:45 | February 22, 2021 05:45 | 10d 15h | 42,968 | 2.2M |
| 2 | August 12, 2021 13:30 | August 12, 2021 21:30 | 8h | 4,435 | 1,249 |
| 3 | January 10, 2021 15:15 | January 12, 2021 08:15 | 1d 17h | 3,860 | 28K |
| 4 | December 20, 2021 13:30 | December 21, 2021 02:00 | 12h 30m | 3,622 | 2,506 |
| 5 | August 27, 2021 20:00 | August 28, 2021 02:15 | 6h 15m | 3,492 | 2,264 |
| 6 | October 28, 2021 13:15 | October 30, 2021 06:15 | 1d 17h | 3,481 | 26K |
| 7 | April 23, 2021 05:45 | April 24, 2021 12:45 | 1d 7h | 3,073 | 11K |
| 8 | June 8, 2021 10:30 | June 10, 2021 11:30 | 2d 1h | 2,752 | 15K |
| 9 | May 6, 2021 13:15 | May 6, 2021 17:30 | 4h 15m | 2,667 | 672 |
| 10 | October 20, 2021 13:45 | October 21, 2021 02:00 | 12h 15m | 2,549 | 1,370 |
Outage episodes by size in 2021: 139 reached 100+ customers, 27 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 McLennan 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 |
| Navasota Valley Elec Coop, Inc | 2021 | 527.1 hrs | 10.31 | 7.9 hrs | 3.41 |
| Heart of Texas Electric Coop | 2021 | 14.1 hrs | 2.22 | 7.1 hrs | 1.93 |
| HILCO Electric Cooperative, Inc. | 2021 | 13.4 hrs | 3.49 | 1.6 hrs | 0.85 |
| Texas-New Mexico Power Co | - | - | - | - | - |
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 ÷ 101,960 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. McLennan County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), McLennan 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/mclennan-county