Southport PM2.5 (fine particulate matter) AQI is 31 - Southport PM10 (respirable particulate matter) AQI is 11 - Southport NO2 (nitrogen dioxide) AQI is 2 - Southport SO2 (sulfur dioxide) AQI is n/a - Southport O3 (ozone) AQI is 8 - Southport CO (carbon monoxide) AQI is n/a -