Up Links
Emission Inventory Documentation
This page last reviewed February 11, 2013
Air pollution comes from a wide variety of sources. It comes from large industrial facilities, as well as from things we use in our daily lives such as cars and trucks, paints, and aerosol spray products. For convenience, we have grouped air pollution sources into five major categories that are listed below.
On-Road Sources
Sources of on-road air pollution include automobiles, motorcycles, and trucks.
Emission Data
Off-Road Sources
Off-road mobile sources include the following categories: small off-road engines
and equipment, off-road recreational vehicles, farm and construction
equipment, forklifts, locomotives, commercial marine vessels, and
marine pleasure craft. Emission Data
Stationary Sources
Stationary sources of air pollution include
non-mobile sources such as power plants, refineries, and manufacturing
facilities. Emission Data
Areawide Sources
Areawide sources of pollution are those where the emissions are spread over a wide area, such as consumer products,
fireplaces, road dust, and farming operations. Emission Data
Natural Sources
Natural sources are non-manmade emission sources, which include biological and geological sources, wildfires,
windblown dust, and biogenic emissions from plants and trees.
Emission Data
