Karur vs Kolkata
Side-by-side air quality comparison between Karur 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, Karur averaged an AQI of 71 while Kolkata averaged 101 — a 30-point (42%) gap, with Kolkata the more polluted and Karur the cleaner of the two. On 71 days when both cities reported, Karur was cleaner on 69 of them; the average daily gap was 104 AQI points.
Seasonality & days
Karur peaks in December, while Kolkata peaks in January. Karur logged 0% Severe days and 80.3% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Karur 34 days, Kolkata 75 days.
Year-over-year progress
The worst recorded day for Karur reached AQI 149 at Kamadenu Nagar (TNPCB) on 2024-11-26; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Karur spans 1 CPCB stations with a 0-point spread (min 71, max 71); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).