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Air Quality Data provided by the Bureau of Air Quality, Pennsylvania's Department of Environmental Protection (dep.pa.gov)
Note that the measurements for PM2.5 (小粒子状物質), PM10 (吸入性粒子状物質) and O3 (オゾン) are taken from the station Lawrenceville, Allegheny, Pennsylvania and the measurement for and CO (一酸化炭素) are taken from the station Glassport High Street, Allegheny, Pennsylvania