Description: Under the Clean Air Act, EPA is required to regulate emissions of hazardous air pollutants. This is the current list of pollutants (Final rule effective: February 4, 2022). NOTE: For all listings above which contain the word 'compounds' and for glycol ethers, the following applies: Unless otherwise specified, these listings are defined as including any unique chemical substance that contains the named chemical (i.e., antimony, arsenic, etc.) as part of that chemical's infrastructure.

Number of Chemicals: 188