Planning >> Attainment Planning >> Designation History (Ozone, PM2.5, Sulfur Dioxide (SO2), and Carbon Monoxide)
Designation History
Ozone Nonattainment Areas
Areas not meeting the ozone standard and recommended for nonattainment designation.

Sulfur Dioxide (SO2) Nonattainment Areas
Areas not meeting the SO2 standard and recommended for nonattainment designation.
 
Particle Pollution (PM2.5) Nonattainment Areas
Areas not meeting the fine particle standard and recommended for nonattainment designation.

Maintenance Area Map for Carbon Monoxide (CO)