Kolkata vs Sasaram
Side-by-side air quality comparison between Kolkata and Sasaram.
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 Sasaram averaged 109 — a 8-point (8%) gap, with Sasaram the more polluted and Kolkata the cleaner of the two. On 674 days when both cities reported, Sasaram was cleaner on 371 of them; the average daily gap was 54 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Sasaram was 0.1% Severe and 37% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Sasaram 27 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Sasaram has improved by 166 AQI points (60.4%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Sasaram hit AQI 401 at Dada Peer (BSPCB) on 2021-11-28.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Sasaram spans 1 stations with a 0-point spread (min 148, max 148).