15 Year (1990 - 2005) Trend of Ozone Levels in Region Nonattainment Areas

Note: an area is attaining the 8-hour ozone standard when it has a design value of 0.084 parts per million (ppm) or less.
Animated map showing 15 year air quality trend in 8-hr ozone nonattainment areas. Values displayed represent the 4th highest maximum daily value for each non-attainment area. Ozone levels are in ppm.

Mid-Atlantic Air Protection Home || Mid-Atlantic Region Home
Index of Air Topics || Directions & Accommodations || State & Local Agencies

Jump to main content.