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 16 Oct 2024: Bang Na 27.2 µg/m³, Ban Samae Dam 25.6 µg/m³ and Nong Khaem 23.8 µg/m³.
- 1Bang NaBangkok27.2
- 2Ban Samae DamBangkok25.6
- 3Nong KhaemBangkok23.8
- 4Khlong Sam WaBangkok22.3
- 5Tha BoNong Khai21.2
- 6BangkokBangkok19.5
- 7Saphan SungBangkok19.5
- 8Khan Na YaoBangkok18.1
- 9Bang KapiBangkok17.4
- 10Lak SiBangkok17.1
- 11Bueng KumBangkok16.9
- 12Ban Khlong PrawetBangkok16.5
- 13Sai MaiBangkok15.9
- 14Mueang NonthaburiNonthaburi15.5
- 15Lat KrabangBangkok15.5
- 16Nong ChokBangkok15.0
Not counted on this day, too few days measured: Samut Sakhon since 12 Oct 2024, Phra Pradaeng since 12 Oct 2024, Nakhon Pathom since 12 Oct 2024 and 33 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.