20.2.3.111

NMAC

none

none

0.10 ppm

1-hour average

40 CFR 50

100 ppb

none

none

Annual arithmetic mean

40 CFR 50.11

0.053 ppm

0.053 ppm

0.05 ppm

Ozone (O₃)

8-hour average

40 CFR 50.15

0.070 ppm

0.070 ppm

none

(Effective December 28, 2015)

Sulfur Dioxide (SO₂)

1-hour average

40 CFR 50.4

0.75 ppb

none

none

3-hour average

40 CFR 50.5

none

0.5 ppm

none

24-hour average