ການພະຍາກອນຄຸນນະພາບອາກາດ
ຂໍ້ມູນຄຸນນະພາບອາກາດສະໜອງໃຫ້ໂດຍ: the Washington State Department of Ecology (ecy.wa.gov) and Air Now - US EPA (airnow.gov)
Note that the measurements for PM2.5 (fine particulate matter) and PM10 (respirable particulate matter) are taken from the station: Monroe St, Spokane, Washington