County annual report · FIPS 48245
2021 Jefferson County, TX Power Outage Report
In 2021, customers in Jefferson County, TX went without power for an average of 24.0 hours, a total of 1.2M customer-hours (Texas average 21.0 hours). That ranks 118th worst of 252 Texas counties and 350th 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 Jefferson 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 13:00 | February 18, 2021 04:00 | 3d 15h | 32,400 | 442K |
| 2 | October 27, 2021 12:15 | October 30, 2021 02:45 | 2d 14h | 13,668 | 129K |
| 3 | July 19, 2021 11:45 | July 21, 2021 04:30 | 1d 16h | 6,579 | 25K |
| 4 | May 16, 2021 10:30 | May 19, 2021 04:00 | 2d 17h | 5,707 | 26K |
| 5 | June 15, 2021 10:30 | June 17, 2021 06:45 | 1d 20h | 5,636 | 41K |
| 6 | June 13, 2021 22:45 | June 15, 2021 07:00 | 1d 8h | 5,546 | 10K |
| 7 | May 19, 2021 05:00 | May 21, 2021 01:15 | 1d 20h | 5,222 | 50K |
| 8 | May 27, 2021 19:45 | May 28, 2021 10:00 | 14h 15m | 5,176 | 28K |
| 9 | August 8, 2021 17:45 | August 9, 2021 08:15 | 14h 30m | 4,708 | 22K |
| 10 | August 16, 2021 04:30 | August 18, 2021 04:00 | 1d 23h | 4,108 | 18K |
Outage episodes by size in 2021: 227 reached 100+ customers, 50 reached 1,000+ customers, 2 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 Jefferson 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 |
|---|---|---|---|---|---|
| Entergy Texas Inc. | 2021 | 16.7 hrs | 3.31 | 4.7 hrs | 2.02 |
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 ÷ 51,659 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. Jefferson County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Jefferson 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/jefferson-county