Kannur vs Kolkata
Side-by-side air quality comparison between Kannur 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, Kannur averaged an AQI of 65 while Kolkata averaged 101 — a 36-point (55%) gap, with Kolkata the more polluted and Kannur the cleaner of the two. On 1174 days when both cities reported, Kannur was cleaner on 1020 of them; the average daily gap was 94 AQI points.
Seasonality & days
Kannur peaks in February, while Kolkata peaks in January. Kannur logged 0% Severe days and 92% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Kannur 103 days, Kolkata 75 days.
Year-over-year progress
Kannur has worsened by 11 AQI points (20.4%) from 2020 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Kannur reached AQI 258 at Thavakkara Kannur (PCB) on 2021-04-14; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Kannur spans 1 CPCB stations with a 0-point spread (min 66, max 66); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).