SmogRank / Cleaner or dirtier / Thailand
Thailand: cleaner or dirtier, 2025
In Thailand, 7 cities have enough days in both years to compare 2025 with the same days of 2024: 2 got dirtier and 4 cleaner.
The 2 cities that got dirtier, biggest rise first
| # | City | 2024 | 2025 | Change |
|---|---|---|---|---|
| 1 | Khan Na YaoBangkok, Thailand | 82 | 86 | +2.4 µg/m³+9% |
| 2 | Bang KapiBangkok, Thailand | 78 | 81 | +1.3 µg/m³+5% |
The 4 cities that got cleaner, biggest fall first
| # | City | 2024 | 2025 | Change |
|---|---|---|---|---|
| 1 | Nong KhaemBangkok, Thailand | 89 | 87 | −1.4 µg/m³−5% |
| 2 | Ban Khlong PrawetBangkok, Thailand | 75 | 74 | −0.2 µg/m³−1% |
| 3 | Mueang NonthaburiNonthaburi, Thailand | 79 | 78 | −0.2 µg/m³−1% |
| 4 | BangkokThailand | 80 | 80 | −0.2 µg/m³−1% |
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.