2nd largest plant in Texas · 19th nationally
South Texas Project is a nuclear power plant in Texas with a nameplate capacity of 2,709 MW. It generates roughly 21.8M MWh per year — enough to power about 2,074,966 average U.S. homes.
Its capacity factor of 92% means it runs nearly around-the-clock as baseload generation.
| Plant Name | South Texas Project |
|---|---|
| Operator | Stp Nuclear Operating Co |
| City | Wadsworth |
| County | Matagorda County |
| State | Texas |
| ZIP | 77483 |
| Coordinates | 28.79500, -96.04810 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 1 | Nuclear | Uranium | 1,354 MW | Operating | 1988 |
| 2 | Nuclear | Uranium | 1,354 MW | Operating | 1989 |
| Owner | Location | Share |
|---|---|---|
| Constellation Nuclear | Warrenville, IL | 4400.0% |
| City Of San Antonio - (Tx) | San Antonio, TX | 4000.0% |
| Austin Energy | Austin, TX | 1600.0% |
Ownership reported to EIA Form 860. Percentages reflect reported generator-level ownership share, averaged when a plant has multiple generators.
| NERC Region | TRE |
|---|---|
| Balancing Authority | Electric Reliability Council Of Texas, Inc. |
Nuclear plants generate carbon-free baseload electricity by fissioning uranium fuel inside a reactor. They run nearly around-the-clock — typical capacity factors above 90% — and a single facility can power millions of homes. Spent fuel is stored on-site in dry casks. NRC oversees safety; emergency planning zones extend 10 miles from the reactor.