Chandigarh vs Kolkata
Side-by-side air quality comparison between Chandigarh 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, Chandigarh averaged an AQI of 153 while Kolkata averaged 101 — a 52-point (51%) gap, with Chandigarh the more polluted and Kolkata the cleaner of the two. On 1582 days when both cities reported, Chandigarh was cleaner on 805 of them; the average daily gap was 77 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Chandigarh logged 0.3% Severe days and 39.9% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Chandigarh 92 days, Kolkata 75 days.
Year-over-year progress
Chandigarh has worsened by 27 AQI points (21.4%) from 2019 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Chandigarh reached AQI 452 at Sector-53 (CPCC) on 2022-11-09; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Chandigarh spans 3 CPCB stations with a 43-point spread (min 107, max 150); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).