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 20 Aug 2024: Bang Na 20.3 µg/m³, Lat Krabang 17.8 µg/m³ and Nong Khaem 15.2 µg/m³.
- 1Bang NaBangkok20.3
- 2Lat KrabangBangkok17.8
- 3Nong KhaemBangkok15.2
- 4Saphan SungBangkok14.8
- 5Khan Na YaoBangkok14.0
- 6Samut SakhonSamut Sakhon13.6
- 7Bang Bo DistrictSamut Prakan13.6
- 8BangkokBangkok13.2
- 9Phra PradaengSamut Prakan13.0
- 10Bang KapiBangkok11.6
- 11Nakhon PathomNakhon Pathom10.5
- 12Khlong LuangPathum Thani10.1
- 13Mueang NonthaburiNonthaburi9.9
- 14Ban Khlong PrawetBangkok9.9
- 15Samut PrakanSamut Prakan9.7
- 16Sai MaiBangkok9.2
- 17Tha BoNong Khai7.2
Not counted on this day, too few days measured: Sukhothai since 19 Aug 2024, Phuket since 19 Aug 2024, Lamphun since 19 Aug 2024 and 47 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.