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40 CFR Part 50

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Copy of the October 17, 2006 Final - National Ambient Air Quality Standards for Particulate Matter (PDF)

Copy of the January 16, 2006 Proposal - National Ambient Air Quality Standards for Particulate Matter (PDF)

Go to GPO copy of Part 50. (Note: Appendices A - K are contained in Section 50.12.)

Recently Promulgated Regulations - Parts 50, 53, 58

Proposed Regulations - Parts 50, 53, 58

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