ការព្យាករណ៍គុណភាពខ្យល់

ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ the Colorado Department of Environmental Protection (colorado.gov)
Note that the measurement for O3 (ozone) are taken from the station: USA:Colorado/Manitou and the measurements for CO (carbon monoxide) and SO2 (sulfur dioxide) are taken from the station: USA:Colorado/Highway 24






