County annual report · FIPS 48139
2021 Ellis County, TX Power Outage Report
In 2021, customers in Ellis County, TX went without power for an average of 20.2 hours, a total of 1.6M customer-hours (Texas average 21.0 hours). That ranks 138th worst of 252 Texas counties and 427th 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 Ellis 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 14, 2021 13:15 | February 22, 2021 05:30 | 7d 16h | 25,236 | 1.3M |
| 2 | October 10, 2021 18:15 | October 12, 2021 07:45 | 1d 13h | 5,793 | 8,862 |
| 3 | May 16, 2021 12:30 | May 17, 2021 09:30 | 21h | 5,439 | 12K |
| 4 | October 28, 2021 12:30 | October 30, 2021 22:00 | 2d 9h | 5,051 | 40K |
| 5 | June 18, 2021 16:15 | June 19, 2021 07:45 | 15h 30m | 4,932 | 9,215 |
| 6 | May 3, 2021 14:45 | May 5, 2021 06:45 | 1d 16h | 3,784 | 26K |
| 7 | October 13, 2021 13:00 | October 14, 2021 23:00 | 1d 10h | 3,478 | 2,336 |
| 8 | March 17, 2021 09:00 | March 18, 2021 06:30 | 21h 30m | 3,365 | 12K |
| 9 | February 11, 2021 06:15 | February 14, 2021 10:45 | 3d 4h | 2,541 | 27K |
| 10 | November 13, 2021 01:15 | November 13, 2021 09:15 | 8h | 2,395 | 3,560 |
Outage episodes by size in 2021: 145 reached 100+ customers, 36 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 Ellis 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 |
| HILCO Electric Cooperative, Inc. | 2021 | 13.4 hrs | 3.49 | 1.6 hrs | 0.85 |
| Navarro 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 ÷ 80,952 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. Ellis County has data for 2015, 2017–2025.
Cite this report
MassOutage (massoutage.com), Ellis 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/ellis-county