Sonny Bono, Imperial, California PM2.5 (fine particulate matter) AQI is 10 - Sonny Bono, Imperial, California PM10 (respirable particulate matter) AQI is 14 - Sonny Bono, Imperial, California NO2 (nitrogen dioxide) AQI is n/a - Sonny Bono, Imperial, California SO2 (sulfur dioxide) AQI is n/a - Sonny Bono, Imperial, California O3 (ozone) AQI is 20 - Sonny Bono, Imperial, California CO (carbon monoxide) AQI is n/a -