Bulandshahr vs Kollam
Side-by-side air quality comparison between Bulandshahr and Kollam.
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 Kollam averaged 84 — a 58-point (69%) gap, with Bulandshahr the more polluted and Kollam the cleaner of the two. On 1405 days when both cities reported, Kollam was cleaner on 1110 of them; the average daily gap was 101 AQI points.
Seasonality & days
Bulandshahr peaks in November, while Kollam peaks in January. Bulandshahr logged 3.2% Severe days and 27.099999999999998% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Bulandshahr 41 days, Kollam 65 days.
Year-over-year progress
Bulandshahr has improved by 82 AQI points (36.6%) from 2018 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Bulandshahr reached AQI 500 at Yamunapuram (UPPCB) on 2018-06-13; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Bulandshahr spans 1 CPCB stations with a 0-point spread (min 180, max 180); Kollam spans 1 stations with a 0-point spread (min 84, max 84).