Air Quality Lab — Rayong, Thailand
Air Quality Profile·
Rayong reports an annual PM2.5 of 20.1 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Rayong
Thailand
ThailandAnnual Average
ModerateWHO annual classification
20.1µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
2727 µg/m³ — Poor
3434 µg/m³ — Poor
2525 µg/m³ — Poor
2222 µg/m³ — Moderate
1414 µg/m³ — Fair
1212 µg/m³ — Fair
1111 µg/m³ — Fair
1212 µg/m³ — Fair
1212 µg/m³ — Fair
2020 µg/m³ — Moderate
2525 µg/m³ — Moderate
2727 µg/m³ — Poor
Jan
Feb
Mar
Apr
May
Jun
2727 µg/m³ — Poor
3434 µg/m³ — Poor
2525 µg/m³ — Poor
2222 µg/m³ — Moderate
1414 µg/m³ — Fair
1212 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
1111 µg/m³ — Fair
1212 µg/m³ — Fair
1212 µg/m³ — Fair
2020 µg/m³ — Moderate
2525 µg/m³ — Moderate
2727 µg/m³ — Poor
Best months: Jul–SepWorst months: Jan–Feb, Dec
Fair10–15 µg/m³Moderate15–25 µg/m³Poor25–35 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Thailand
Rayong: 20.1 µg/m³. Typical range in Thailand: 21.3–28.9 µg/m³. Low anchor: Phuket, 15.1 µg/m³. High anchor: Chiang Mai, 32.6 µg/m³.
202 cities tracked