Sulfur Dioxide (2010) Maintenance Area (Redesignated from Nonattainment) Summary

Data is current as of February 28, 2025

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Number of Areas	Number of Counties	2010 Population
20	27	1,313,568

County subtotals and grand totals may not equal sum of parts. Part counties are only counted one time across groupings. Multi-state nonattainment areas are not considered maintenance areas until all states in the area have been redesignated