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 18 Nov 2024: Bang Na 33.1 µg/m³, Nong Khaem 33.0 µg/m³ and Ban Samae Dam 30.4 µg/m³.
- 1Bang NaBangkok33.1
- 2Nong KhaemBangkok33.0
- 3Ban Samae DamBangkok30.4
- 4Khlong Sam WaBangkok30.2
- 5Tha BoNong Khai27.0
- 6Saphan SungBangkok25.6
- 7BangkokBangkok25.2
- 8Lat KrabangBangkok25.2
- 9Sai MaiBangkok24.8
- 10Bueng KumBangkok24.6
- 11Lak SiBangkok24.3
- 12Khan Na YaoBangkok24.2
- 13Bang KapiBangkok23.8
- 14Ban Khlong PrawetBangkok22.8
- 15Nong ChokBangkok21.2
- 16Mueang NonthaburiNonthaburi21.0
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.