Bihar Sharif vs Kollam
Side-by-side air quality comparison between Bihar Sharif 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, Bihar Sharif averaged an AQI of 115 while Kollam averaged 84 — a 31-point (37%) gap, with Bihar Sharif the more polluted and Kollam the cleaner of the two. On 750 days when both cities reported, Kollam was cleaner on 559 of them; the average daily gap was 85 AQI points.
Seasonality & days
Bihar Sharif peaks in December, while Kollam peaks in January. Bihar Sharif logged 1% Severe days and 39.1% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Bihar Sharif 32 days, Kollam 65 days.
Year-over-year progress
Bihar Sharif has improved by 138 AQI points (54.5%) from 2021 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Bihar Sharif reached AQI 433 at D M Colony Bihar (BSPCB) on 2021-12-24; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Bihar Sharif spans 1 CPCB stations with a 0-point spread (min 146, max 146); Kollam spans 1 stations with a 0-point spread (min 84, max 84).