Bihar Sharif vs Kolkata
Side-by-side air quality comparison between Bihar Sharif 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, Bihar Sharif averaged an AQI of 115 while Kolkata averaged 101 — a 14-point (14%) gap, with Bihar Sharif the more polluted and Kolkata the cleaner of the two. On 594 days when both cities reported, Kolkata was cleaner on 313 of them; the average daily gap was 65 AQI points.
Seasonality & days
Bihar Sharif peaks in December, while Kolkata peaks in January. Bihar Sharif logged 1% Severe days and 39.1% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Bihar Sharif 32 days, Kolkata 75 days.
Year-over-year progress
Bihar Sharif has improved by 138 AQI points (54.5%) from 2021 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Bihar Sharif reached AQI 433 at D M Colony Bihar (BSPCB) on 2021-12-24; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Bihar Sharif spans 1 CPCB stations with a 0-point spread (min 146, max 146); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).