Kolkata vs Sagar
Side-by-side air quality comparison between Kolkata and Sagar.
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 Sagar averaged 96 — a 5-point (5%) gap, with Kolkata the more polluted and Sagar the cleaner of the two. On 1313 days when both cities reported, Sagar was cleaner on 980 of them; the average daily gap was 85 AQI points.
Seasonality & days
Kolkata peaks in January, while Sagar peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Sagar was 0% Severe and 69.9% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Sagar 57 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Sagar has worsened by 24 AQI points (33.3%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Sagar hit AQI 347 at Civil Lines (MPPCB) on 2024-12-25.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Sagar spans 2 stations with a 45-point spread (min 73, max 118).