Eastern Pennsylvania
Alliance for Clean Transportation

A member of the US DOE’s Clean Cities Program

Natural Gas

Natural gas is an odorless, nontoxic, gaseous mixture of hydrocarbons—pre-dominantly methane (CH4). It is domestically produced and readily distributed through pipelines in the United States and in Pennsylvania. It is a gaseous fuel which means, it must be stored onboard a vehicle in either a compressed gaseous or liquefied state. Compressed natural gas (CNG) is typically stored in a tank at a pressure of 3,000 to 3,600 pounds per square inch. Liquefied natural gas (LNG) is super-cooled and stored in its liquid phase at -260°F in special insulated tanks. Natural gas is sold in units of gasoline (GGE’s) or diesel (DGE’S) gallon equivalents based on the energy content of a gallon of gasoline or diesel fuel.

Compressed Natural Gas

To provide adequate driving range for a vehicle, CNG is stored in cylinders at a pressure of 3,000 to 3,600 pounds per square inch. A CNG-powered vehicle gets about the same fuel economy as a conventional gasoline vehicle on a gasoline gallon equivalent basis. A GGE equals about 5.66 pounds of CNG. CNG is used in light, medium and heavy-duty applications.

Liquefied Natural Gas

LNG is produced by purifying natural gas and super-cooling it to -260°F to turn it into a liquid. Because it must be kept at cold temperatures, LNG is stored in double-walled, vacuum-insulated pressure vessels. LNG is good for trucks needing a longer range because liquid is more dense than gas (CNG) and, therefore, more energy can be stored by volume in a given tank. LNG is typically used in medium and heavy-duty vehicles; a GGE equals about 1.5 gallons of LNG.

The Basics of Natural Gas

Information on the benefits and considerations of natural gas.

Natural Gas Fuel Station Locator

Find a fueling station near you.  

Fuel Prices

View the latest National Average Price Report for Alt Fuels

Past CNG Workshop Presentations


Sustaining Level Stakeholders

AQUA America  Clean Citiesdvrpc  Greater Philadelphia Chamber of Commerce 
PECOPA DEP    UPS Zarwin Baum


Eastern Pennsylvania Alliance for Clean Transportation
1900 Market Street, Suite 800
Philadelphia, PA  19103

 Tel:  215-990-8200

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