7
National Ambient Air Quality Standards
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Older Version
2006/2008 Version
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Ozone
0.08 ppm (8-hour)
0.075 ppm (8-hour)
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PM
2.5
15 ug/m
3
(annual)
15 ug/m
3
(annual)
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65 ug/m
3
(daily)
35 ug/m
3
(daily)
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Lead
1.5 ug/m
3
Between 0.10-0.30 ug/m
3
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(Proposed)
(quarterly)
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