Sources of Air Pollution are four mobile sources, stationary sources, point sources and area sources
Sources of Air Pollution
In discussions of air pollution sources, four terms are routinely used:
- Mobile sources
- Stationary sources
- Point sources
- Area sources
Mobile sources
Mobile sources are generally related to transportation. Mobile sources are not included
within the general parameters for fugitive emissions and, therefore, will be given no further
consideration in this course.
Stationary sources
Stationary sources define emission sources that are fixed and include all forms and types of
manufacturing, chemical and petroleum processing, power generation, and small business
facilities.
Point sources
A stationary point source refers to any place within a facility from which emissions are
possible. For a given facility, a stack may be one point source. An emission leak within a
process is also considered a point source. An automobile or a truck would represent a point
source or mobile source.
Area sources
Area source refers to any one of several sources contributing to the air pollution of a given
geographic area. Area sources may be stationary, mobile, or a combination of stationary and
mobile
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