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40 C.F.R. Part 81 – Designation of Areas for Air Quality Planning Purposes | Midpage
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Code of Federal Regulations
Title 40
Chapter I
Subchapter C
Part 81
40 C.F.R. Part 81
Designation of Areas for Air Quality Planning Purposes
A
Meaning of Terms
B
Designation of Air Quality Control Regions
C
Section 107 Attainment Status Designations
D
Identification of Mandatory Class I Federal Areas Where Visibility Is an Important Value
E
Identification of Interstate Transport Regions