ការព្យាករណ៍គុណភាពខ្យល់
ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ the Colorado Department of Environmental Protection (colorado.gov)
Note that the measurement for O3 (ozone) are taken from the station: USA:Colorado/Palisade Ozone & Met and the measurement for CO (carbon monoxide) are taken from the station: USA:Colorado/Grand Junction Shelter