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Air Quality Data provided by the Washington State Department of Ecology (ecy.wa.gov)
Note that the measurements for PM2.5 (тонкодисперсных частиц), O3 (озон), CO (окись углерода) and NO2 (диоксида азота) are taken from the station 10th and Weller, Seattle, Washington and the measurement for and SO2 (сернистый газ) are taken from the station Beacon Hill, Seattle, Washington