As of Thursday, October 12, 2023, there is no information available on the current PSI in Singapore. The latest information available is from October 7, 2023, when the 24-hour Pollutant Standards Index (PSI) for the eastern and central regions of Singapore were 111 and 102 respectively, which is considered "unhealthy". The PSI is calculated based on the 24-hour average of the concentration levels of PM10, PM2.5, sulphur dioxide (SO2), nitrogen dioxide (NO2) . The health impact of haze is dependent on ones health status. The National Environment Agency (NEA) advises the public to cut down on outdoor activities when the PSI reading is between 101 to 200. NEA provides daily haze advisories that can be used by the public to plan their activities and events for the next 24 hours.