SmogRank / Cleaner or dirtier / Thailand
Thailand: cleaner or dirtier, 2024
In Thailand, 8 cities have enough days in both years to compare 2024 with the same days of 2023: 3 got dirtier and 4 cleaner.
The 3 cities that got dirtier, biggest rise first
| # | City | 2023 | 2024 | Change |
|---|---|---|---|---|
| 1 | Nakhon PathomThailand | 71 | 72 | +0.6 µg/m³+3% |
| 2 | Phra PradaengSamut Prakan, Thailand | 71 | 71 | +0.5 µg/m³+3% |
| 3 | Samut SakhonThailand | 77 | 77 | +0.2 µg/m³+1% |
The 4 cities that got cleaner, biggest fall first
| # | City | 2023 | 2024 | Change |
|---|---|---|---|---|
| 1 | Tha BoNong Khai, Thailand | 104 | 75 | −14.9 µg/m³−40% |
| 2 | Mueang NonthaburiNonthaburi, Thailand | 74 | 72 | −1.0 µg/m³−5% |
| 3 | BangkokThailand | 77 | 75 | −1.0 µg/m³−4% |
| 4 | Bang KapiBangkok, Thailand | 70 | 68 | −0.8 µg/m³−4% |
Means in US AQI over the days a city was measured in both years, the same calendar days each year; a city needs 55% of the days paired, and at least 30. The change is in µg/m³ and per cent. How we compare.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Updated 2026-10-07 12:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.