Attala
Natural gas power plant in Attala County, Mississippi. 551.3 MW of nameplate capacity across 3 generators, operated by Entergy Mississippi LLC.
Also known as Attala Power Plant · EIA plant 55220
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Key facts
- Capacity
- 551.3 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- March 2001First generator online
- Operator
- Entergy Mississippi LLCEIA operator ID 12685
- Grid
- MISOBalancing authority MISO
- Price nodes
- 1 MISO nodeResource nodes with prices
- Location
- Attala County, MS33.0147, −89.6753
- EIA plant ID
- 55220EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Attala produces
Free · EIA-923Net generation, 2025
2.22 TWh
2,221,476 MWh, final. 11 of 12 months reported
Capacity factor, 2025
50.3%
2024: 66.7%
January to July 2026
1.82 TWh
Provisional
Range, 2015 to 2023
1.7–3.3
TWh a year. Low 2019, high 2022
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 1,439,576 | Not reported | 7 of 12 |
| 2002 | 1,365,736 | Not reported | 12 of 12 |
| 2003 | 314,300 | Not reported | 12 of 12 |
| 2004 | 696,532 | Not reported | 12 of 12 |
| 2005 | 2,595,318 | Not reported | 12 of 12 |
| 2006 | 2,001,040 | Not reported | 12 of 12 |
| 2007 | 2,527,549 | Not reported | 12 of 12 |
| 2008 | 2,234,398 | Not reported | 12 of 12 |
| 2009 | 1,621,023 | Not reported | 12 of 12 |
| 2010 | 1,870,148 | 42.7% | 12 of 12 |
| 2011 | 1,526,044 | 34.8% | 12 of 12 |
| 2012 | 1,931,407 | Not reported | 12 of 12 |
| 2013 | 2,193,526 | Not reported | 12 of 12 |
| 2014 | 3,232,686 | 66.9% | 12 of 12 |
| 2015 | 3,297,745 | 68.3% | 12 of 12 |
| 2016 | 3,059,868 | 63.2% | 12 of 12 |
| 2017 | 2,295,278 | 47.5% | 12 of 12 |
| 2018 | 2,204,188 | 45.6% | 12 of 12 |
| 2019 | 1,658,876 | 34.3% | 12 of 12 |
| 2020 | 1,962,966 | 40.5% | 12 of 12 |
| 2021 | 2,492,523 | 51.6% | 12 of 12 |
| 2022 | 3,346,398 | 69.3% | 12 of 12 |
| 2023 | 2,943,986 | 61.0% | 12 of 12 |
| 2024 | 2,956,937 | 66.7% | 11 of 12 |
| 2025 | 2,221,476 | 50.3% | 11 of 12 |
| 2026 (provisional, partial year) | 1,819,191 | 64.9% | 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 account · MISOEmissions
Free · EPA CAMPDCO₂, 2025
962,913
US short tons. 2024: 1.28M
SO₂, 2025
5
US short tons
NOx, 2025
95
US short tons
2 of 2 EPA units reported CO₂ in 2025 (A01, A02), matched to EIA plant 55220 through the EPA–EIA crosswalk.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
707
million gallons
Consumption, 2024
632
million gallons
Source
Big Black River
Surface, Fresh. Induced-draft tower
Watershed stress
Low · 0.246
USGS SUI, HUC12 Pony Branch-Long Creek
12 of 12 cooling months report withdrawal. SUI of the HUC12 containing the plant. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| A01 | Natural Gas Fired Combined Cycle | 176.6 | March 2001 |
| A02 | Natural Gas Fired Combined Cycle | 176.6 | March 2001 |
| A03 | Natural Gas Fired Combined Cycle | 198.1 | March 2001 |
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 Entergy Mississippi LLC 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 Attala
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Questions about Attala
How much power does Attala produce?
Attala reported 2,221,476 MWh (2.22 TWh) of net generation in 2025, a 50.3% capacity factor on 551.3 MW of nameplate capacity. From January to July 2026 it reported 1.82 TWh, which is provisional. 11 of 12 months were reported for 2025.
Where is Attala?
Attala is in Attala County, Mississippi, at 33.0147, −89.6753. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Attala?
EIA-860M for August 2026 lists Entergy Mississippi LLC as the operator (EIA operator ID 12685). The operator is not always the owner.
When did Attala start operating?
Its first generator began operating in March 2001, according to EIA-860M.
Does InfraMap have power prices for Attala?
Yes. InfraMap has MISO day-ahead and real-time prices at 1 price node linked to Attala, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
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
- MISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- 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