Kolkata vs Mumbai
Side-by-side air quality comparison between Kolkata and Mumbai.
Live AQI from Open-Meteo CAMS (~45 km global model, updated hourly). Multi-year history from CPCB station data via aqinow.co pipeline (2016–2024, station-level daily records).
AQI Comparison
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Mumbai averaged 93 — a 8-point (9%) gap, with Kolkata the more polluted and Mumbai the cleaner of the two. On 2006 days when both cities reported, Kolkata was cleaner on 1280 of them; the average daily gap was 68 AQI points.
Seasonality & days
Kolkata peaks in January, while Mumbai peaks in December. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Mumbai was 0.5% Severe and 34% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Mumbai 58 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Mumbai has improved by 4 AQI points (4.1%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Mumbai hit AQI 500 at Vile Parle West (MPCB) on 2022-08-15.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Mumbai spans 29 stations with a 74-point spread (min 77, max 151).