Air Quality Lab — Kolkata, India
Air Quality Profile·
Kolkata reports an annual PM2.5 of 53.1 µg/m³. That's above the EU annual limit of 25 µg/m³ — long-term exposure here carries documented health trade-offs.
Kolkata
India
IndiaAnnual Average
Very UnhealthyWHO annual classification
53.1µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
8484 µg/m³ — Hazardous
7878 µg/m³ — Hazardous
6262 µg/m³ — Very Unhealthy
3939 µg/m³ — Unhealthy
3232 µg/m³ — Poor
2828 µg/m³ — Poor
2424 µg/m³ — Moderate
2424 µg/m³ — Moderate
2828 µg/m³ — Poor
4949 µg/m³ — Unhealthy
9797 µg/m³ — Hazardous
9393 µg/m³ — Hazardous
Jan
Feb
Mar
Apr
May
Jun
8484 µg/m³ — Hazardous
7878 µg/m³ — Hazardous
6262 µg/m³ — Very Unhealthy
3939 µg/m³ — Unhealthy
3232 µg/m³ — Poor
2828 µg/m³ — Poor
Jul
Aug
Sep
Oct
Nov
Dec
2424 µg/m³ — Moderate
2424 µg/m³ — Moderate
2828 µg/m³ — Poor
4949 µg/m³ — Unhealthy
9797 µg/m³ — Hazardous
9393 µg/m³ — Hazardous
Best months: Jun–AugWorst months: Jan, Nov–Dec
Moderate15–25 µg/m³Poor25–35 µg/m³Unhealthy35–50 µg/m³Very Unhealthy50–75 µg/m³Hazardous>75 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across India
Kolkata: 53.1 µg/m³. Typical range in India: 32.5–54.7 µg/m³. Low anchor: Kollam, 24.5 µg/m³. High anchor: Durg, 120.1 µg/m³.
2,241 cities tracked