air-quality-control   region.Environmental   law.   A   federally   designated   area   in   which

communities share  an  air-pollution  problem,  often  involving  several states; an  interstate area  or

major  intrastate  area  that  the  Environmental  Protection  Agency  designates  for  monitoring  and

ameliorating  ambient  air-quality  standards.  42  USCA  §  7407(c).  [Cases:  Environmental  Law

254–301.] [Blacks Law 8th]