Delhi vs Kolkata
Side-by-side air quality comparison between Delhi and Kolkata.
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, Delhi averaged an AQI of 210 while Kolkata averaged 101 — a 109-point (108%) gap, with Delhi the more polluted and Kolkata the cleaner of the two. On 2076 days when both cities reported, Kolkata was cleaner on 1962 of them; the average daily gap was 149 AQI points.
Seasonality & days
Delhi peaks in November, while Kolkata peaks in January. Delhi logged 18.7% Severe days and 1.7% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Delhi 3 days, Kolkata 75 days.
Year-over-year progress
Delhi has improved by 42 AQI points (16.7%) from 2016 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Delhi reached AQI 500 at Ashok Vihar (DPCC) on 2024-11-18; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Delhi spans 39 CPCB stations with a 84-point spread (min 178, max 262); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).