Thailand State of Pollution 2020 showed that good water quality was increased (Upper Tapi River was in excellent quality), overall image of coastal water quality was better, overall image of air quality in general areas was better than the previous year, and solid wastes were decreased from 2019.
Pollution Control Department, Ministry of Natural Recourses and Environment concluded Thailand State of Pollution 2020 as follows. State of water quality: Water quality moved higher from fair to good quality, Upper Tapi River was in excellent quality in the past 10-year period (2011-2020), and water quality of water sources trended to be better which most of them were at fair to good quality and none was in very poor quality. State of coastal water quality: Overall image of coastal water quality was better which changing trend of them in the past 10-year period mostly were in good quality except in the area of Gulp of Thailand with continuing poor quality. State of air quality in general areas: Overall image of air quality was better than the previous year, top 5 of provinces with best air quality were Narathiwat, Satun, Phuket, Songkhla and Yala, respectively with no number of days which air quality exceeded the standard. Critical areas: The PM2.5 situation in Bangkok and its vicinity was decreased from 2019. Haze in Northern provinces: There were 112 days which particulate matter exceeded the standard which could be referred that in 2019 the accumulated number of hotspots was decreased. Solid wastes: The amount of solid wastes was 27.35 million tons (4% decreased from 2019). Municipal hazardous wastes: The amount of municipal hazardous wastes was 658,651 tons (1.6% increased from 2019). Infectious wastes: The amount of infectious wastes was 47,962 tons (10% decreased from 2019).