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Air Quality Data provided by the Iowa Department of Natural Resources - Regulatory Air (shl.uiowa.edu)
Note that the measurements for PM2.5 (미세먼지), O3 (오존), CO (일산화탄소) and SO2 (아황산가스) are taken from the station Jefferson School, Davenport, Iowa and the measurement for and PM10 (호흡 미립자) are taken from the station Linwood Mining, Buffalo, Iowa