In terms of air quality, As at 10am today, Colombo’s air pollution status stood at unhealthy level of 157, as measured by PM 2.5 (fine particulate matter).The ‘Unhealthy’ level, which ranges from 151-200, means the air quality “is increased likelihood of adverse effects and aggravation to the heart and lungs among general public - particularly for sensitive groups.” according to the Air Quality Index (AQI) categorizations.Colombo’s air pollution status will stand at ‘unhealthy’ level today and tomorrow, the National Building Research Organization (NBRO) said citing the AQI predictions of the US Embassy in Colombo.