SmogRank / World / India / West Bengal / March 2025

Most polluted cities in West Bengal, India, March 2025

7 cities in West Bengal, India ranked by their average PM2.5 over the 31 days. Worst: Āsansol at 72.8 µg/m³, #23 of 2,809 cities in the world. Cleanest: Haldia at 29.0. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Siliguri 100% 75%0
Every city in West Bengal, India ranked for March 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Siliguri
    100%
  2. 2Āsansol
    97%
  3. 3Durgapur
    97%
  4. 4Rānīganj
    97%
  5. 5Shrīrāmpur
    87%
  6. 6Kolkata
    84%
  7. 7Haldia
    32%
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

All cities in the world, March 2025 · All cities in India, March 2025 · West Bengal now

Use this board

SmogRank, most polluted cities in West Bengal, India, PM2.5, March 2025, smogrank.com/in/region/west-bengal/history/2025-03 (accessed 6 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.