Air Quality Lab — Santiago, Chile
Air Quality Profile
Santiago reports an annual PM2.5 of 27.5 µg/m³. That's above the EU annual limit of 25 µg/m³ — long-term exposure here carries documented health trade-offs.
Santiago
Chile
ChileAnnual Average
PoorWHO annual classification
27.5µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
1717 µg/m³ — Moderate
1919 µg/m³ — Moderate
2020 µg/m³ — Moderate
3434 µg/m³ — Poor
3838 µg/m³ — Unhealthy
4444 µg/m³ — Unhealthy
4141 µg/m³ — Unhealthy
3939 µg/m³ — Unhealthy
2626 µg/m³ — Poor
1818 µg/m³ — Moderate
1616 µg/m³ — Moderate
1919 µg/m³ — Moderate
Jan
Feb
Mar
Apr
May
Jun
1717 µg/m³ — Moderate
1919 µg/m³ — Moderate
2020 µg/m³ — Moderate
3434 µg/m³ — Poor
3838 µg/m³ — Unhealthy
4444 µg/m³ — Unhealthy
Jul
Aug
Sep
Oct
Nov
Dec
4141 µg/m³ — Unhealthy
3939 µg/m³ — Unhealthy
2626 µg/m³ — Poor
1818 µg/m³ — Moderate
1616 µg/m³ — Moderate
1919 µg/m³ — Moderate
Best months: Jan, Oct–NovWorst months: Jun–Aug
Moderate15–25 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 Chile
Santiago: 27.5 µg/m³. Typical range in Chile: 15.3–20.5 µg/m³. Low anchor: Coquimbo, 13.9 µg/m³. High anchor: Coyhaique, 37.5 µg/m³.
87 cities tracked