Guide 0-50 = Good Air quality is considered satisfactory 50-100 = Moderate Air quality is acceptable 100-150 = Unhealthy for Sensitive Groups 150-200 = Unhealthy Everyone may begin to experience health effects 200-300 = Very Unhealthy Health warnings of emergency conditions. 300+ = Hazardous Health alert !
Guide Nitro D = no2(nitrogen dioxide) Values are converted from µg/m3 to AQI levels using the EPA standard. Sulfur Dioxide = so2 (Sulfur Dioxide Air Values are converted from µg/m3 to AQI levels using the EPA standard.