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Air Quality Data provided by the Pima County Department of Environmental Quality Air (pima.gov)
Note that the measurement for and PM10 (respirable particulate matter) are taken from the station South Tucson, Pima County and the measurements for CO (carbon monoxide) and NO2 (nitrogen dioxide) are taken from the station Geronimo, Pima County and the measurement for and SO2 (sulfur dioxide) are taken from the station Childrens Park NCore, Pima County