ExxonMobil Oil Joliet Refinery
Natural gas power plant in Will County, Illinois. 36.9 MW of nameplate capacity across 2 generators, operated by ExxonMobil Oil Corp.
Also known as EIA plant 50627
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 36.9 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- May 1986First generator online
- Operator
- ExxonMobil Oil CorpEIA operator ID 5519
- Grid
- PJMBalancing authority PJM
- Price nodes
- None linkedNo verified ISO node
- Location
- Will County, IL41.4167, −88.1833
- EIA plant ID
- 50627EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power ExxonMobil Oil Joliet Refinery produces
Free · EIA-923Net generation, 2025
185 GWh
185,264 MWh, final
Capacity factor, 2025
48.7%
2024: 46.4%
January to July 2026
117 GWh
Provisional
Range, 2015 to 2025
171.7–210.8
GWh a year. Low 2018, high 2020
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 250,431 | Not reported | 12 of 12 |
| 2002 | 256,435 | Not reported | 12 of 12 |
| 2003 | 203,627 | Not reported | 12 of 12 |
| 2004 | 176,920 | Not reported | 12 of 12 |
| 2005 | 150,964 | Not reported | 12 of 12 |
| 2006 | 112,126 | Not reported | 12 of 12 |
| 2007 | 107,579 | Not reported | 12 of 12 |
| 2008 | 49,584 | Not reported | 12 of 12 |
| 2009 | 110,333 | Not reported | 12 of 12 |
| 2010 | 138,208 | 39.8% | 12 of 12 |
| 2011 | 194,142 | 56.0% | 12 of 12 |
| 2012 | 155,592 | 44.7% | 12 of 12 |
| 2013 | 188,933 | 54.5% | 12 of 12 |
| 2014 | 182,727 | Not reported | 12 of 12 |
| 2015 | 171,700 | 49.4% | 12 of 12 |
| 2016 | 198,461 | Not reported | 12 of 12 |
| 2017 | 194,787 | Not reported | 12 of 12 |
| 2018 | 171,694 | 49.4% | 12 of 12 |
| 2019 | 181,682 | 52.2% | 12 of 12 |
| 2020 | 210,753 | 60.4% | 12 of 12 |
| 2021 | 186,182 | 53.5% | 12 of 12 |
| 2022 | 147,262 | 50.5% | 10 of 12 |
| 2023 | 179,974 | Not reported | 12 of 12 |
| 2024 | 177,044 | 46.4% | 12 of 12 |
| 2025 | 185,264 | 48.7% | 12 of 12 |
| 2026 (provisional, partial year) | 117,058 | 53.0% | 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
Not reported
US short tons. 2024: Not reported
SO₂, 2025
Not reported
US short tons
NOx, 2025
52
US short tons
0 of 1 EPA units reported CO₂ in 2025 (20B1), matched to EIA plant 50627 through the EPA–EIA crosswalk.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GTG1 | Other Gases | 25.7 | November 1987 |
| MG | Other Gases | 11.2 | May 1986 |
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 ExxonMobil Oil Corp 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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Questions about ExxonMobil Oil Joliet Refinery
How much power does ExxonMobil Oil Joliet Refinery produce?
ExxonMobil Oil Joliet Refinery reported 185,264 MWh (185 GWh) of net generation in 2025, a 48.7% capacity factor on 36.9 MW of nameplate capacity. From January to July 2026 it reported 117 GWh, which is provisional.
Where is ExxonMobil Oil Joliet Refinery?
ExxonMobil Oil Joliet Refinery is in Will County, Illinois, at 41.4167, −88.1833. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates ExxonMobil Oil Joliet Refinery?
EIA-860M for August 2026 lists ExxonMobil Oil Corp as the operator (EIA operator ID 5519). The operator is not always the owner.
When did ExxonMobil Oil Joliet Refinery start operating?
Its first generator began operating in May 1986, 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
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page