35 Ill. Adm. Code 201.141
Prohibition of Air Pollution
Section 201
Section 201.141 Prohibition
of Air Pollution
No person shall cause or
threaten or allow the discharge or emission of any contaminant into the
environment in any State so as, either alone or in combination with
contaminants from other sources, to cause or tend to cause air pollution in
Illinois, or so as to violate the provisions of this Chapter, or so as to
prevent the attainment or maintenance of any applicable ambient air quality
standard.