File:US-overall-nonattainment-2007-06.png
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Map of National Ambient Air Quality Standards (NAAQS) in the U.S. The NAAQS are health standards for lead, carbon monoxide, sulfur dioxide, ground-level 8-hour ozone, and particular matter (PM-10 and PM-2.5). There are no nitrogen dioxide nonattainment areas.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:21, 28 December 2010 | | 760 × 560 (25 KB) | Cshearer19 (talk | contribs) | Map of National Ambient Air Quality Standards (NAAQS) in the U.S. The NAAQS are health standards for lead, carbon monoxide, sulfur dioxide, ground-level 8-hour ozone, and particular matter (PM-10 and PM-2.5). There are no nitrogen dioxide nonattainment ar |
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