Section 1 Metropolitan statistical areas included in nonattainment areas
Section 107(d)(4)(A) of the Clean Air Act (42 U.S.C. 7407(d)(4)(A)) is amended—
by striking clause (v); and
by amending clause (iv) to read as follows:
“(iv) Within 60 days after the enactment of this sentence, the Administrator shall require each State to revise the boundaries of all nonattainment areas that included entire metropolitan statistical areas or consolidated metropolitan statistical areas pursuant to this clause as in effect before the enactment of this sentence. Such revision shall exclude from the nonattainment area all counties within each metropolitan statistical area or consolidated metropolitan statistical area that are not in violation of the national ambient air quality standard concerned (as determined by air quality monitoring and not by computer modeling).”