County annual report · FIPS 48473
2021 Waller County, TX Power Outage Report
In 2021, customers in Waller County, TX went without power for an average of 234.3 hours, a total of 4.3M customer-hours (Texas average 21.0 hours). That ranks 6th worst of 252 Texas counties and 21st 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 Waller 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 18:00 | February 25, 2021 07:30 | 10d 13h | 96,048 | 3.2M |
| 2 | September 10, 2021 11:30 | September 19, 2021 17:15 | 9d 5h | 31,129 | 523K |
| 3 | May 17, 2021 13:00 | May 21, 2021 06:45 | 3d 17h | 9,547 | 54K |
| 4 | May 28, 2021 12:00 | May 31, 2021 07:30 | 2d 19h | 7,152 | 48K |
| 5 | October 23, 2021 14:00 | November 10, 2021 08:15 | 17d 18h | 6,256 | 82K |
| 6 | May 31, 2021 12:45 | June 23, 2021 05:30 | 22d 16h | 3,536 | 47K |
| 7 | May 21, 2021 12:00 | May 28, 2021 05:30 | 6d 17h | 3,184 | 12K |
| 8 | July 9, 2021 08:45 | July 11, 2021 08:00 | 1d 23h | 3,050 | 6,815 |
| 9 | August 12, 2021 12:30 | August 24, 2021 08:45 | 11d 20h | 2,599 | 41K |
| 10 | July 26, 2021 11:30 | July 28, 2021 10:30 | 1d 23h | 2,591 | 5,009 |
Outage episodes by size in 2021: 118 reached 100+ customers, 27 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 Waller 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 |
| San Bernard Electric Coop, Inc | 2021 | 2.4 hrs | 1.36 | 1.8 hrs | 1.22 |
| Mid-South Electric Coop Assn | - | - | - | - | - |
| City of Hempstead - (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 ÷ 18,532 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. Waller County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Waller 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/waller-county