Kolkata vs Virudhunagar
Side-by-side air quality comparison between Kolkata and Virudhunagar.
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 Virudhunagar averaged 52 — a 49-point (94%) gap, with Kolkata the more polluted and Virudhunagar the cleaner of the two. On 195 days when both cities reported, Virudhunagar was cleaner on 187 of them; the average daily gap was 97 AQI points.
Seasonality & days
Kolkata peaks in January, while Virudhunagar peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Virudhunagar was 0% Severe and 92.3% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Virudhunagar 31 days.
Year-over-year progress
The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Virudhunagar hit AQI 173 at Collectorate Office (TNPCB) on 2024-11-07.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Virudhunagar spans 1 stations with a 0-point spread (min 52, max 52).