Bangor, Maine PM2.5 (fine particulate matter) AQI is 74 - Bangor, Maine PM10 (respirable particulate matter) AQI is n/a - Bangor, Maine NO2 (nitrogen dioxide) AQI is n/a - Bangor, Maine SO2 (sulfur dioxide) AQI is n/a - Bangor, Maine O3 (ozone) AQI is n/a - Bangor, Maine CO (carbon monoxide) AQI is n/a -