Bulandshahr vs Kolkata
Side-by-side air quality comparison between Bulandshahr 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, Bulandshahr averaged an AQI of 142 while Kolkata averaged 101 — a 41-point (41%) gap, with Bulandshahr the more polluted and Kolkata the cleaner of the two. On 1913 days when both cities reported, Kolkata was cleaner on 1242 of them; the average daily gap was 71 AQI points.
Seasonality & days
Bulandshahr peaks in November, while Kolkata peaks in January. Bulandshahr logged 3.2% Severe days and 27.099999999999998% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Bulandshahr 41 days, Kolkata 75 days.
Year-over-year progress
Bulandshahr has improved by 82 AQI points (36.6%) from 2018 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Bulandshahr reached AQI 500 at Yamunapuram (UPPCB) on 2018-06-13; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Bulandshahr spans 1 CPCB stations with a 0-point spread (min 180, max 180); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).