Kolkata vs Perundurai
Side-by-side air quality comparison between Kolkata and Perundurai.
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 Perundurai averaged 75 — a 26-point (35%) gap, with Kolkata the more polluted and Perundurai the cleaner of the two. On 57 days when both cities reported, Perundurai was cleaner on 57 of them; the average daily gap was 126 AQI points.
Seasonality & days
Kolkata peaks in January, while Perundurai peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Perundurai was 0% Severe and 80.7% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Perundurai 13 days.
Year-over-year progress
The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Perundurai hit AQI 153 at SIPCOT Industrial Park (TNPCB) on 2024-11-12.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Perundurai spans 1 stations with a 0-point spread (min 75, max 75).