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Initial List of Hazardous Air Pollutants with Modifications
U.S. Environmental Protection Agency
Updated May 26, 2026
Updated ad hoc
About this dataset
Under the Clean Air Act, EPA is required to regulate emissions of hazardous air pollutants. This original list included 189 pollutants. Since 1990, EPA has modified the list through rulemaking to include 188 hazardous air pollutants.
Data and resources (1)
- XLSX
Initial List of Hazardous Air Pollutants with Modifications
For all listings 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…
22 KBModified Sep 25, 2024Table and Data API available
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