ការព្យាករណ៍គុណភាពខ្យល់

ទិន្នន័យគុណភាពខ្យល់ផ្តល់ដោយ៖ the Wisconsin Department Of Natural Resources (airquality.wi.gov)
Note that the measurement for O3 (ozone) are taken from the station: Milw 16th St, Wisconsin and the measurement for NO2 (nitrogen dioxide) are taken from the station: Milw Coll. Ave.-nr, Wisconsin