ການພະຍາກອນຄຸນນະພາບອາກາດ
ຂໍ້ມູນຄຸນນະພາບອາກາດສະໜອງໃຫ້ໂດຍ: the Washington State Department of Ecology (ecy.wa.gov) and Air Now - US EPA (airnow.gov)
Note that the measurement for O3 (ozone) are taken from the station: Queen Anne Hill, Seattle, Washington and the measurement for CO (carbon monoxide) are taken from the station: Town Center, Lake Forest Park, Washington and the measurement for NO2 (nitrogen dioxide) are taken from the station: Olive St, Seattle, Washington