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 Unhealthye Health warnings of emergency conditions. 300+ = !
Guide Nitro D = NO2(Nitrogen Dioxide) Values are converted from µg/m3 to AQI levels using the EPA standard. Sulfur Dioxide = SO2 (Sulfur Dioxide) Values are converted from µg/m3 to AQI levels using the EPA standard.