The AQI in Tumkur is at 51, which places it in the Moderate category. PM2.5 and PM10 are at 22 µg/m³ and 51 µg/m³ . Ozone (O3) levels are at 9 ppb , with NO2 levels at 8 ppb , which may cause mild irritation in sensitive individuals. CO at 330 ppb is within the acceptable limit, so most individuals can still go about their day. However, if you suffer from respiratory conditions, you may want to limit outdoor exposure.