Bangkok air pollution predicted to reach “unhealthy” levels
At least some good news, Bangkok’s air quality has improved during the lockdown period. In January, it was listed as the “third most polluted city in the world.” By April, air pollution levels dropped down to a “safe” and “healthy”, according to the US Air Quality Index, or AQI. Now the bad news, forecasts predict Bangkok’s air pollution will reach “unhealthy” levels again.
Air with containing low levels of the air pollutant PM2.5 is considered “safe.” PM 2.5 is fine particulate matter less than 2.5 micrometres in diameter. At high levels, it can be harmful to people’s health. AQI is measured by the concentration of air pollutants. An AQI at 0 to 50 is considered safe, while 300 and up is considered dangerous…
- 0-50: Good
- 51-100: Moderate
- 101-150:Unhealthy for sensitive groups
- 151-200: Unhealthy
- 201-300: Very unhealthy
- 301-500: Hazardous
Just yesterday, Bangkok was listed as the 16th city with the worst air quality in the world on Air Visuals with an AQI of 108 with PM 2.5 at 38 micrograms per cubic meter (µg/m3). This morning, Bangkok’s air quality was reported at a “moderate” level with an AQI of 95, according to Air Visuals.
Another website, through the World Air Quality Index project, reported the city’s AQI at 129, a level that can be harmful to sensitive groups. Both websites forecast the AQI to increase by tonight to “unhealthy” levels that could be harmful to someone’s health. Levels are expected to increase today to an AQI of 158 to 171.
The Pollution Control Department says the air quality in Bangkok fluctuates. While AQI was reported at a fairly high level yesterday, Bangkok has been between a “good” and “moderate” level with PM2.5 at around 20 to 42 µg/m3 detected by 71 air quality stations, according to the department.
The top 5 cities with the worst air quality, as of this morning on Air Visuals, are Delhi, India with 192 AQI; Shenyang, China with 186 AQI; Beijing, China with 174 AQI; Chongqing, China with 172 AQI and Chengdu, China with 167 AQI.
SOURCES: Nation Thailand | Air Visuals | World Air Quality Index project
