SmogRank / History / City race
Cities in Thailand, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in Thailand for PM2.5 over the 30 days to 23 Mar 2024: Khlong Luang 30.2 µg/m³, Nong Khaem 29.1 µg/m³ and Bang Kapi 26.4 µg/m³.
- 1Khlong LuangPathum Thani30.2
- 2Nong KhaemBangkok29.1
- 3Bang KapiBangkok26.4
- 4Sai MaiBangkok26.3
- 5Khan Na YaoBangkok26.2
- 6BangkokBangkok26.0
- 7Nakhon PathomNakhon Pathom25.0
- 8Phra PradaengSamut Prakan24.8
- 9Mueang NonthaburiNonthaburi24.8
- 10Bueng KumBangkok24.2
- 11Lat KrabangBangkok24.0
- 12Bang Bo DistrictSamut Prakan23.4
- 13Ban Khlong PrawetBangkok22.6
- 14Samut SakhonSamut Sakhon21.9
- 15Samut PrakanSamut Prakan20.6
Not counted on this day, too few days measured: Ranong since 21 Mar 2024, Nong Chok since 21 Mar 2024, Sukhothai since 19 Mar 2024 and 50 more cities.
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites; we are building the readers for them. Most cities there are missing from this board, not clean. Why.