Middletown — United States of America
Oil power plant in Connecticut, United States of America. Approximate location 41.5549, -72.5791.
OilConnecticutUnited States of AmericaSteamCO₂ measured
Middletown is a 767.9 MW oil power station in Connecticut, United States of America. It is operated by Middletown Power LLC. Based on reported annual generation of 193 GWh, it can supply roughly 55k homes. It ranks #825 of 10,884 United States of America power plants by installed capacity. Commissioned in 1967, it is around 59 years old — an older, legacy facility. Its annual emissions of 132,892 t CO₂/yr (US EPA GHGRP) are equivalent to about 31k cars driven for a year. In context, oil supplies about 0.7% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0000562.
Data status
Known data
Calculated from dataset
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Data provenance
Source of the capacity and fuel values:
capacity: GEM · 2026 · L100000402087; fuel: WRI GPPD
In context: how this plant compares
At 767.9 MW, Middletown is well above the median oil plant in United States of America (7.2 MW). Technically it is described as Steam. Oil-fired plants burn heavy fuel oil or diesel, usually as peaking or backup capacity on islands and grids without gas pipelines; high fuel cost keeps their utilisation low.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
132,892 t CO₂/yr — in everyday terms
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; emissions per US EPA GHGRP (measured for US EPA/EU ETS, modelled for Climate TRACE).
Key facts
- Load factor
- 3%, from 193 GWh of reported generation; the median for 469 oil plants in United States of America that report generation is 0%
- Generation trend
- 108 GWh in 2013 and 193 GWh in 2019 (+78%)
- Highest and lowest year
- 2015: 423 GWh; 2013: 108 GWh
- Share of United States of America oil capacity
- 1.9% of 40,022 MW across 902 plants in this dataset
- Age among peers
- 59 of 877 dated oil plants in United States of America are older
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Reported generation trend
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by Middletown Power LLC.
Local climate & thermal context
This oil plant burns oil or diesel to drive turbines or reciprocating engines. It sits in a hot-summer humid continental climate (Köppen Dfa) — Northern Hemisphere, latitude 41.6°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 29% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 67/100 — this site sits in the top third of the power plants we cover by heating degree-days.
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
Site climate & environmental severity
This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness the leading environmental stress.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
How it compares & nearby plants
The #11 largest oil power plant of 902 in United States of America by capacity.
United States of America has 902 oil power plants in this dataset, together about 40,022 MW of capacity.
Nearby power plants
- GenConn Middletown LLC · Oil · 244 MW · Connecticut
- Kleen Energy Systems Project · Gas · 693 MW · Connecticut
- Wesleyan University Cogen 1 · Gas · 2.4 MW · Connecticut
- DWW Solar ll · Solar · 36.9 MW · Connecticut
- Connecticut Yankee nuclear power plant · Nuclear · 603 MW · Connecticut
- CP Middletown Solar I LLC · Solar · 1 MW · Connecticut
Location
Coordinates 41.5549, -72.5791 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Middletown?
Middletown is a 767.9 MW oil power plant in Connecticut, United States of America, commissioned in 1967.
How much electricity does Middletown generate?
Middletown generates about 193 GWh of electricity per year.
Who operates Middletown?
Middletown is operated by Middletown Power LLC.
How much CO₂ does Middletown emit?
Middletown has measured emissions of about 132,892 tonnes of CO₂ per year (US EPA GHGRP).