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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
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Title 40
Chapter I
Part 63
Subpart C - Subpart C—List of Hazardous Air Pollutants, Petitions Process, Lesser Quantity Designations, Source Category List
§ 63.60 - Deletion of caprolactam from the list of hazardous air pollutants.
§ 63.61 - Deletion of methyl ethyl ketone from the list of hazardous air pollutants.
§ 63.62 - Redefinition of glycol ethers listed as hazardous air pollutants.
§ 63.63 - Deletion of ethylene glycol monobutyl ether from the list of hazardous air pollutants.
§ 63.64 - Additions of substances to the list of hazardous air pollutants.
§§ 63.65-63.69 - §[Reserved]
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