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 Mar 2024: Khlong Luang 27.7 µg/m³, Nong Khaem 26.3 µg/m³ and Bang Kapi 25.4 µg/m³.
- 1Khlong LuangPathum Thani27.7
- 2Nong KhaemBangkok26.3
- 3Bang KapiBangkok25.4
- 4Khan Na YaoBangkok25.1
- 5Sai MaiBangkok24.9
- 6Nong ChokBangkok24.4
- 7BangkokBangkok24.1
- 8Lat KrabangBangkok23.5
- 9Phra PradaengSamut Prakan23.1
- 10Nakhon PathomNakhon Pathom23.0
- 11Bueng KumBangkok23.0
- 12Bang Bo DistrictSamut Prakan22.7
- 13Mueang NonthaburiNonthaburi21.8
- 14Ban Khlong PrawetBangkok21.2
- 15Samut SakhonSamut Sakhon19.5
- 16Samut PrakanSamut Prakan19.1
- 17RanongRanong province17.2
Not counted on this day, too few days measured: Sukhothai since 19 Mar 2024, Ratchaburi since 19 Mar 2024, Mae Sai since 19 Mar 2024 and 48 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.