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Air Quality Data provided by the South Coast Air Quality Management District (AQMD) (aqmd.gov) and CARB - California Air Resources Board (arb.ca.gov)
Note that the measurements for PM2.5 (小粒子状物質), O3 (オゾン) and NO2 (二酸化窒素) are taken from the station USA:SouthCoast/Los Angeles/North Hollywood and the measurements for PM10 (吸入性粒子状物質), CO (一酸化炭素) and SO2 (二酸化硫黄) are taken from the station Los Angeles-North Main Street