Section 216.121  Fuel Combustion Emission Sources

A person must not cause or allow the emission of carbon monoxide (CO) into the atmosphere from any fuel combustion emission source with actual heat input greater than 2.9 MW (10 mmbtu/hr) to exceed 200 ppm, corrected to 50 percent excess air.

(Source:  Amended at 48 Ill. Reg. 13742, effective August 30, 2024)