Ghaziabad vs Kolkata
Side-by-side air quality comparison between Ghaziabad 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, Ghaziabad averaged an AQI of 177 while Kolkata averaged 101 — a 76-point (75%) gap, with Ghaziabad the more polluted and Kolkata the cleaner of the two. On 2067 days when both cities reported, Kolkata was cleaner on 1739 of them; the average daily gap was 106 AQI points.
Seasonality & days
Ghaziabad peaks in November, while Kolkata peaks in January. Ghaziabad logged 12.2% Severe days and 13.700000000000001% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Ghaziabad 19 days, Kolkata 75 days.
Year-over-year progress
Ghaziabad has improved by 115 AQI points (39.4%) from 2017 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Ghaziabad reached AQI 500 at Vasundhara (UPPCB) on 2017-12-21; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Ghaziabad spans 4 CPCB stations with a 30-point spread (min 198, max 228); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).