Kolkata vs Rohtak
Side-by-side air quality comparison between Kolkata and Rohtak.
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 Rohtak averaged 148 — a 47-point (47%) gap, with Rohtak the more polluted and Kolkata the cleaner of the two. On 1945 days when both cities reported, Kolkata was cleaner on 1016 of them; the average daily gap was 80 AQI points.
Seasonality & days
Kolkata peaks in January, while Rohtak peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Rohtak was 1.1% Severe and 36.599999999999994% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Rohtak 45 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Rohtak has improved by 123 AQI points (45.4%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Rohtak hit AQI 498 at MD University (HSPCB) on 2019-11-03.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Rohtak spans 1 stations with a 0-point spread (min 159, max 159).