Waterloo
Natural gas and oil power plant in Monroe County, Illinois. 27 MW of nameplate capacity across 6 generators, operated by City of Waterloo - (IL).
Also known as Waterloo Power Plant · EIA plant 971
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 27 MWNatural gas 21.6 · Oil 5.4
- Generators
- 6 operatingEIA-860M, August 2026
- Operating since
- June 1996First generator online
- Operator
- City of Waterloo - (IL)EIA operator ID 20180
- Grid
- MISOBalancing authority MISO
- Price nodes
- None linkedNo verified ISO node
- Location
- Monroe County, IL38.3348, −90.1589
- EIA plant ID
- 971EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Waterloo produces
Free · EIA-923Net generation, 2025
751 MWh
751 MWh, final
Capacity factor, 2025
0.3%
2024: 0.2%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
0.2–1.1
GWh a year. Low 2016, high 2021
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 0 | Not reported | 12 of 12 |
| 2001 | 103 | Not reported | 12 of 12 |
| 2002 | 478 | Not reported | 12 of 12 |
| 2003 | 487 | Not reported | 12 of 12 |
| 2004 | 487 | Not reported | 12 of 12 |
| 2005 | 1,835 | Not reported | 12 of 12 |
| 2006 | 406 | Not reported | 12 of 12 |
| 2007 | 411 | Not reported | 12 of 12 |
| 2008 | 483 | Not reported | 12 of 12 |
| 2009 | 258 | Not reported | 12 of 12 |
| 2010 | 17 | 0.1% | 1 of 12 |
| 2011 | 48 | 0.4% | 1 of 12 |
| 2012 | 558 | Not reported | 12 of 12 |
| 2013 | 459 | 0.2% | 12 of 12 |
| 2014 | 766 | 0.3% | 12 of 12 |
| 2015 | 350 | 0.1% | 12 of 12 |
| 2016 | 152 | 0.1% | 12 of 12 |
| 2017 | 630 | 0.2% | 12 of 12 |
| 2018 | 468 | 0.2% | 12 of 12 |
| 2019 | 494 | 0.2% | 12 of 12 |
| 2020 | 452 | 0.2% | 12 of 12 |
| 2021 | 1,088 | 0.4% | 12 of 12 |
| 2022 | 581 | 0.2% | 12 of 12 |
| 2023 | 462 | 0.2% | 12 of 12 |
| 2024 | 491 | 0.2% | 12 of 12 |
| 2025 | 751 | 0.3% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 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 CAMPDNo EPA emissions units are linked to this plant.
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 |
|---|---|---|---|
| 9 | Petroleum Liquids | 1.8 | June 1996 |
| 10 | Petroleum Liquids | 1.8 | June 1996 |
| 11 | Petroleum Liquids | 1.8 | June 1996 |
| 12 | Natural Gas Fired Combustion Turbine | 6.6 | May 2002 |
| 13 | Natural Gas Fired Combustion Turbine | 7.0 | May 2012 |
| 14 | Natural Gas Fired Combustion Turbine | 8.0 | January 2026 |
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 City of Waterloo - (IL) 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 Waterloo
How much power does Waterloo produce?
Waterloo reported 751 MWh (751 MWh) of net generation in 2025, a 0.3% capacity factor on 27 MW of nameplate capacity.
Where is Waterloo?
Waterloo is in Monroe County, Illinois, at 38.3348, −90.1589. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Waterloo?
EIA-860M for August 2026 lists City of Waterloo - (IL) as the operator (EIA operator ID 20180). The operator is not always the owner.
Is Waterloo a natural gas or a oil plant?
Both. Natural gas capacity totals 21.6 MW and oil capacity totals 5.4 MW.
When did Waterloo start operating?
Its first generator began operating in June 1996, 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)
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page