Kolkata vs Surat
Side-by-side air quality comparison between Kolkata and Surat.
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 Surat averaged 83 — a 18-point (22%) gap, with Kolkata the more polluted and Surat the cleaner of the two. On 333 days when both cities reported, Surat was cleaner on 233 of them; the average daily gap was 80 AQI points.
Seasonality & days
Kolkata peaks in January, while Surat peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Surat was 0% Severe and 55.9% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Surat 55 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Surat has improved by 139 AQI points (62.6%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Surat hit AQI 384 at Science Center (SMC) on 2023-08-19.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Surat spans 1 stations with a 0-point spread (min 123, max 123).