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 15 Dec 2024: Nong Khaem 35.2 µg/m³, Khlong Sam Wa 33.0 µg/m³ and Bang Na 32.1 µg/m³.
- 1Nong KhaemBangkok35.2
- 2Khlong Sam WaBangkok33.0
- 3Bang NaBangkok32.1
- 4Ban Samae DamBangkok29.7
- 5Lak SiBangkok29.1
- 6Lat KrabangBangkok27.6
- 7Bueng KumBangkok27.3
- 8Saphan SungBangkok26.8
- 9Tha BoNong Khai26.6
- 10BangkokBangkok26.5
- 11Khan Na YaoBangkok26.1
- 12Bang KapiBangkok25.6
- 13Sai MaiBangkok25.3
- 14Ban Khlong PrawetBangkok24.9
- 15Mueang NonthaburiNonthaburi23.4
- 16Nong ChokBangkok22.3
Not counted on this day, too few days measured: Samut Sakhon since 6 Nov 2024, Phra Pradaeng since 6 Nov 2024, Nakhon Pathom since 6 Nov 2024 and 3 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.