Air Pollution in Hawaii County: Real-time Air Quality Index and smog alert. How polluted is the air today in Hawaii County? What is the air quality now in Hawaii County? Hawaii County,PM2.5,AQI,Air Quality Index,Pollution Index,Pollution,historical data,PM10,respirable particulate matter,NO2,nitrogen dioxide,SO2,sulfur dioxide,CO,carbon monoxide,O3,ozone,smog,forecast Pollution in Hawaii County Pollution in Hawaii County Air Pollution in Hawaii County: Real-time Air Quality Index and smog alert.