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Air Quality Data provided by the Washington State Department of Ecology (ecy.wa.gov)
Note that the measurement for and PM2.5 (小粒子状物質) are taken from the station 7th Ave, Marysville, Washington and the measurement for and O3 (オゾン) are taken from the station S Second St, Mt Vernon, Washington and the measurement for and CO (一酸化炭素) are taken from the station Town Center, Lake Forest Park, Washington