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Air Quality Data provided by the Washington State Department of Ecology (ecy.wa.gov)
Note that the measurement for and O3 (オゾン) are taken from the station Queen Anne Hill, Seattle, Washington and the measurement for and CO (一酸化炭素) are taken from the station Town Center, Lake Forest Park, Washington and the measurement for and NO2 (二酸化窒素) are taken from the station Olive St, Seattle, Washington