Lead (1978) Designated Area Design Values

Data is current as of October 31, 2025
Design Values in µg/m³. "Current Design Values" are current as of the posted Green Book date. Check the Air Quality Design Value site for design value updates.

Display:       Nonattainment and Maintenance Areas       Nonattainment Areas       Maintenance Areas

Click underlined column heading to change report order	Current Design Values as of 07/12/2011 (2009-2010)
Area Name	Design Values	Meets NAAQS Determin.1	Current Status	class sort	Current Classification or at Redesignation	2010 Population
click area name for state/county list					click for classif. history
Collin County, TX		No Data	Maintenance	A	N/A	782,353
Dakota County, MN		No Data	Maintenance	A	N/A	318,833
Douglas County (part); Portion of city of Omaha, NE		No Data	Maintenance	A	N/A	1,242
Fayette County, TN		No Data	Maintenance	A	N/A	38,033
Iron County (part); Dent Township, MO		No Data	Maintenance	A	N/A	1,194
Iron County (part); Liberty and Arcadia, MO		No Data	Maintenance	A	N/A	6,066
Jefferson County (part); Herculaneum, MO	2.9	No	Nonattainment	A	N/A	2,560
Jefferson County, AL		No Data	Maintenance	A	N/A	658,472
Lewis & Clark County (part); City of East Helena and vicinity, MT		No Data	Maintenance	A	N/A	2,669
Marion County; Franklin Township, IN		No Data	Maintenance	A	N/A	18,158
Muscogee County, GA		No Data	Maintenance	A	N/A	189,886
Shelby County, TN		No Data	Maintenance	A	N/A	2,226
Williamson County, TN		No Data	Maintenance	A	N/A	183,182

¹ See the Air Quality Design Value site spreadsheet footnotes for information about "Insufficient Data" Meets NAAQS Determinations.
Design Values in µg/m³. "Current Design Values" are current as of the posted Green Book date. Check the Air Quality Design Value site for design value updates.

Multi-state areas are counted in maintenance totals when all states in the area have been redesignated.

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