County annual report · FIPS 48167
2021 Galveston County, TX Power Outage Report
In 2021, customers in Galveston County, TX went without power for an average of 61.9 hours, a total of 8.9M customer-hours (Texas average 21.0 hours). That ranks 50th worst of 252 Texas counties and 136th 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 Galveston 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 15, 2021 03:00 | February 22, 2021 07:00 | 7d 4h | 164,606 | 6.6M |
| 2 | September 9, 2021 11:45 | September 25, 2021 08:00 | 15d 20h | 57,142 | 1.3M |
| 3 | October 27, 2021 10:00 | November 1, 2021 08:45 | 4d 22h | 14,299 | 102K |
| 4 | May 14, 2021 09:00 | May 31, 2021 05:15 | 16d 20h | 9,744 | 138K |
| 5 | June 1, 2021 12:00 | June 25, 2021 09:30 | 23d 21h | 5,900 | 227K |
| 6 | April 30, 2021 06:30 | May 1, 2021 07:30 | 1d 1h | 5,757 | 11K |
| 7 | July 9, 2021 06:45 | July 10, 2021 07:15 | 1d | 5,357 | 4,896 |
| 8 | August 9, 2021 12:00 | August 12, 2021 11:15 | 2d 23h | 4,416 | 31K |
| 9 | September 28, 2021 11:45 | October 1, 2021 03:45 | 2d 16h | 4,407 | 19K |
| 10 | July 1, 2021 08:00 | July 5, 2021 04:45 | 3d 20h | 4,214 | 15K |
Outage episodes by size in 2021: 152 reached 100+ customers, 41 reached 1,000+ customers, 3 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 Galveston 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 |
| CenterPoint Energy | 2021 | 39.4 hrs | 4.67 | 2.5 hrs | 1.42 |
| 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 ÷ 144,421 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. Galveston County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Galveston 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/galveston-county