1200 W. Washington Street

Phoenix, AZ 85007-2927


Phoenix Office: (602) 542-4251


Tucson Office: (520) 628-6550


Toll Free In-State Only:

1-(800) 222-7000

Gas Terminology

Below are definitions of terms commonly used in the gas industry. This list is not designed to be comprehensive, but rather to give a basic definition. Some of these terms have specific regulatory or technical definitions as spelled out in law or statute. In those situations, the legal or technical definition takes precedence.

British Thermal Unit (Btu):

Bundled service:

City gate:


Cubic foot:

Delivery point:

Department of Energy (DOE):

Energy Information Administration (EIA):

Federal Energy Regulatory Commission (FERC):

FERC Order 636:

Firm service contract:

Flex line:

Independent producer:

Interruptible service:

Local Distribution Company (LDC):

National Energy Strategy (NES):

Natural Gas Act:

Natural gas resource base:

Natural Gas Vehicle (NGV):

Off peak period:

Peak shaving:

Peak use period:

Pounds Per Square Inch Gauge (PSIG):


Proved resources:

Purchased Gas Adjustor (PGA):

Receipt point:


Spot market:

Spot purchase:


Transportation customer:

Unbundled services:

Underground gas storage:


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Arizona Corporation Commission

1200 W. Washington Street

Phoenix, AZ 85007


Corporations Division

1300 W. Washington Street

Phoenix, AZ 85007


Tucson Office (Walk-ins only)

400 W. Congress Street

Tucson, AZ 85701