McWilliams
Natural gas power plant in Covington County, Alabama. 654 MW of nameplate capacity across 7 generators, operated by PowerSouth Energy Cooperative.
Also known as McWilliams Power Plant · EIA plant 533
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Key facts
- Capacity
- 654 MWNameplate
- Generators
- 7 operatingEIA-860M, August 2026
- Operating since
- December 1954First generator online
- Operator
- PowerSouth Energy CooperativeEIA operator ID 189
- Grid
- SOCOBalancing authority SOCO
- Price nodes
- None linkedNo verified ISO node
- Location
- Covington County, AL31.4003, −86.4764
- EIA plant ID
- 533EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power McWilliams produces
Free · EIA-923Net generation, 2025
3.51 TWh
3,514,429 MWh, final
Capacity factor, 2025
61.3%
2024: 50.5%
January to July 2026
1.97 TWh
Provisional
Range, 2015 to 2025
2.9–4.2
TWh a year. Low 2024, high 2020
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 359,624 | Not reported | 12 of 12 |
| 2001 | 295,507 | Not reported | 12 of 12 |
| 2002 | 1,855,549 | Not reported | 12 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | 1,343,074 | Not reported | 12 of 12 |
| 2005 | 992,134 | Not reported | 12 of 12 |
| 2006 | 1,157,926 | Not reported | 12 of 12 |
| 2007 | 1,069,809 | Not reported | 12 of 12 |
| 2008 | 936,532 | Not reported | 8 of 12 |
| 2009 | 1,910,802 | Not reported | 8 of 12 |
| 2010 | 2,834,294 | 49.5% | 12 of 12 |
| 2011 | 2,737,324 | 47.8% | 12 of 12 |
| 2012 | 3,192,485 | 55.6% | 12 of 12 |
| 2013 | 3,164,082 | Not reported | 12 of 12 |
| 2014 | 3,193,339 | 55.7% | 12 of 12 |
| 2015 | 4,001,221 | 69.8% | 12 of 12 |
| 2016 | 3,816,606 | 66.4% | 12 of 12 |
| 2017 | 4,030,157 | 70.3% | 12 of 12 |
| 2018 | 3,957,129 | 69.1% | 12 of 12 |
| 2019 | 3,560,672 | 62.2% | 12 of 12 |
| 2020 | 4,158,113 | 72.4% | 12 of 12 |
| 2021 | 3,999,501 | 69.8% | 12 of 12 |
| 2022 | 3,895,666 | 68.0% | 12 of 12 |
| 2023 | 3,342,941 | 63.2% | 11 of 12 |
| 2024 | 2,898,570 | 50.5% | 12 of 12 |
| 2025 | 3,514,429 | 61.3% | 12 of 12 |
| 2026 (provisional, partial year) | 1,971,954 | 59.3% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDCO₂, 2025
1.51M
US short tons. 2024: 1.26M
SO₂, 2025
8
US short tons
NOx, 2025
202
US short tons
CO₂ per MWh, calculated
0.43 t
About 860 lb per MWh
3 of 3 EPA units reported CO₂ in 2025 (**4, **V1, **V2), matched to EIA plant 533 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
302
million gallons
Consumption, 2024
271
million gallons
Source
Conecuh River
Surface, Fresh. Induced-draft tower
Watershed stress
Very low/none · 0.179
USGS SUI, HUC12 Point A Lake-Conecuh River
24 of 24 cooling months report withdrawal. SUI of the source river HUC12 within 3 km. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Natural Gas Fired Combined Cycle | 7.5 | December 1954 |
| 2 | Natural Gas Fired Combined Cycle | 7.5 | December 1954 |
| 3 | Natural Gas Fired Combined Cycle | 25.0 | August 1959 |
| 4 | Natural Gas Fired Combined Cycle | 107.0 | December 1996 |
| VAN1 | Natural Gas Fired Combined Cycle | 165.0 | January 2002 |
| VAN2 | Natural Gas Fired Combined Cycle | 165.0 | January 2002 |
| VAN3 | Natural Gas Fired Combined Cycle | 177.0 | January 2002 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists PowerSouth Energy Cooperative as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near McWilliams
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Questions about McWilliams
How much power does McWilliams produce?
McWilliams reported 3,514,429 MWh (3.51 TWh) of net generation in 2025, a 61.3% capacity factor on 654 MW of nameplate capacity. From January to July 2026 it reported 1.97 TWh, which is provisional.
Where is McWilliams?
McWilliams is in Covington County, Alabama, at 31.4003, −86.4765. It is in the Southern Company Services, Inc. - Trans balancing area (SOCO).
Who operates McWilliams?
EIA-860M for August 2026 lists PowerSouth Energy Cooperative as the operator (EIA operator ID 189). The operator is not always the owner.
When did McWilliams start operating?
Its first generator began operating in December 1954, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page