Following are the six criteria pollutants for the State Implementation Plan (SIP): 

Carbon Monoxide (CO) | Learn More >

Ground-Level Ozone (O₃ ) Pollution | Learn More >

Particulate Matter (PM₁₀  and PM_2.5 ) Pollution | Learn More >

Lead (Pb) Pollution | Learn More >

Nitrogen Oxide (NO_x ) Pollution | Learn More >

Sulfur Dioxide (SO₂ ) Pollution | Learn More >