Nalco
DuPage County, Illinois · EIA plant ID 50326 · Operator: Nalco Co
Nameplate5MWSummer 4 MW
Generators2in service
Net generation21GWh12 mo to Dec 2025
Capacity factor64%gas/coal/oil units, summer MW
Heat rate5,249Btu/kWhfossil units, electric fuel, HHV
First online1985Runs as baseload
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 26.7 | — | — |
| 2002 | 25.4 | — | — |
| 2003 | 20.7 | 63.8% | 8,761 |
| 2004 | 19 | 58.4% | 5,904 |
| 2005 | 11.4 | 35.3% | 5,904 |
| 2006 | 9.2 | 28.5% | 5,904 |
| 2007 | 18 | 55.5% | 5,904 |
| 2008 | 13.6 | 41.8% | 5,904 |
| 2009 | 17.8 | 54.8% | 5,903 |
| 2010 | 18 | 55.5% | 5,904 |
| 2011 | 15.9 | 48.9% | 5,904 |
| 2012 | 15.3 | 47.1% | 5,904 |
| 2013 | 150.8 | 465.2% | — |
| 2014 | 13.3 | 41.1% | 5,904 |
| 2015 | 13.7 | 42.3% | 5,903 |
| 2016 | 14.1 | 43.3% | 5,411 |
| 2017 | 14.7 | 45.4% | 5,411 |
| 2018 | 1.8 | 5.5% | — |
| 2019 | 18.2 | 56.2% | 5,249 |
| 2020 | 16 | 49.3% | 5,249 |
| 2021 | 14.1 | 43.4% | 5,249 |
| 2022 | 14 | 43.3% | 5,249 |
| 2023 | 16.7 | 51.6% | 5,249 |
| 2024 | 20.3 | 62.5% | 5,249 |
| 2025 | 20.9 | 64.3% | 5,249 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| AT1 | Natural Gas Fired Combined Cycle | CT | 4 | 3 | Nov 1985 | Operating | — | coming soon |
| DPOX | Natural Gas Fired Combined Cycle | CA | 0.7 | 0.7 | Nov 1985 | Operating (Out of service) | — | coming soon |
Owner / operator
Operator: Nalco Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Naperville Trust | 100.0% | 5 MW |
Nearby plants
Within 80 km.
| Aurora | 1,086 MW | 2.9 km |
| BP Naperville Cogeneration Facility | retired | 4.2 km |
| Aurora 7-SLCHI307 | — | 5.9 km |
| WestRock (IL) | 3 MW | 7.7 km |
| DS Containers | 2 MW | 9.1 km |
| Elwood Energy Storage Center | retired | 10.9 km |