Kolār vs Kolkata
Side-by-side air quality comparison between Kolār 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, Kolār averaged an AQI of 65 while Kolkata averaged 101 — a 36-point (55%) gap, with Kolkata the more polluted and Kolār the cleaner of the two. On 993 days when both cities reported, Kolār was cleaner on 866 of them; the average daily gap was 110 AQI points.
Seasonality & days
Kolār peaks in September, while Kolkata peaks in January. Kolār logged 0.9% Severe days and 85.30000000000001% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Kolār 17 days, Kolkata 75 days.
Year-over-year progress
Kolār has improved by 56 AQI points (46.3%) from 2018 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Kolār reached AQI 500 at Tamaka Ind Area (KSPCB) on 2018-09-18; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Kolār 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).