Section .0400-Ambient Air Quality Standards Section .0400 - Ambient Air Quality Standards 0401 Purpose0402 Sulfur Oxides0403 Total Suspended Particulates0404 Carbon Monoxide0405 Ozone0406 Hydrocarbons (Repealed)0407 Nitrogen Dioxide0408 Lead0409 PM10 Particulate Matter0410 PM2.5 Particulate Matter