Air Quality Lab — Phra Nakhon Si Ayutthaya, Thailand
Air Quality Profile·
Phra Nakhon Si Ayutthaya reports an annual PM2.5 of 27.7 µg/m³. That's above the EU annual limit of 25 µg/m³ — long-term exposure here carries documented health trade-offs.
Phra Nakhon Si Ayutthaya
Thailand
ThailandAnnual Average
PoorWHO annual classification
27.7µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
4141 µg/m³ — Unhealthy
4242 µg/m³ — Unhealthy
3636 µg/m³ — Unhealthy
3636 µg/m³ — Unhealthy
3030 µg/m³ — Poor
1818 µg/m³ — Moderate
1515 µg/m³ — Moderate
1414 µg/m³ — Fair
2020 µg/m³ — Moderate
2626 µg/m³ — Poor
2424 µg/m³ — Moderate
3232 µg/m³ — Poor
Jan
Feb
Mar
Apr
May
Jun
4141 µg/m³ — Unhealthy
4242 µg/m³ — Unhealthy
3636 µg/m³ — Unhealthy
3636 µg/m³ — Unhealthy
3030 µg/m³ — Poor
1818 µg/m³ — Moderate
Jul
Aug
Sep
Oct
Nov
Dec
1515 µg/m³ — Moderate
1414 µg/m³ — Fair
2020 µg/m³ — Moderate
2626 µg/m³ — Poor
2424 µg/m³ — Moderate
3232 µg/m³ — Poor
Best months: Jun–AugWorst months: Jan–Mar
Fair10–15 µg/m³Moderate15–25 µg/m³Poor25–35 µg/m³Unhealthy35–50 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Thailand
Phra Nakhon Si Ayutthaya: 27.7 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