Hassan vs Kolkata
Side-by-side air quality comparison between Hassan 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, Hassan averaged an AQI of 60 while Kolkata averaged 101 — a 41-point (68%) gap, with Kolkata the more polluted and Hassan the cleaner of the two. On 791 days when both cities reported, Hassan was cleaner on 693 of them; the average daily gap was 81 AQI points.
Seasonality & days
Hassan peaks in March, while Kolkata peaks in January. Hassan logged 0% Severe days and 92.5% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Hassan 51 days, Kolkata 75 days.
Year-over-year progress
Hassan has improved by 4 AQI points (6.2%) from 2021 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Hassan reached AQI 212 at BKatihalli (KSPCB) on 2024-05-11; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Hassan spans 1 CPCB stations with a 0-point spread (min 63, max 63); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).