Charkhi Dādri vs Kolkata
Side-by-side air quality comparison between Charkhi Dādri 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, Charkhi Dādri averaged an AQI of 145 while Kolkata averaged 101 — a 44-point (44%) gap, with Charkhi Dādri the more polluted and Kolkata the cleaner of the two. On 1167 days when both cities reported, Kolkata was cleaner on 652 of them; the average daily gap was 78 AQI points.
Seasonality & days
Charkhi Dādri peaks in November, while Kolkata peaks in January. Charkhi Dādri logged 0.7% Severe days and 28% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Charkhi Dādri 48 days, Kolkata 75 days.
Year-over-year progress
Charkhi Dādri has improved by 51 AQI points (26%) from 2020 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Charkhi Dādri reached AQI 470 at Mini Secretariat Charkhi (HSPCB) on 2021-11-12; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Charkhi Dādri spans 1 CPCB stations with a 0-point spread (min 162, max 162); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).