Lead (1978) Maintenance Areas (Redesignated from Nonattainment)

Data is current as of December 31, 2024

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Collin County, TX

Dakota County, MN

Douglas County (part); Portion of city of Omaha, NE

Fayette County, TN

Iron County (part); Dent Township, MO

Iron County (part); Liberty and Arcadia, MO

Jefferson County, AL

Lewis & Clark County (part); City of East Helena and vicinity, MT

Marion County; Franklin Township, IN

Muscogee County, GA

Shelby County, TN

Williamson County, TN

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