Kollam vs Siliguri
Side-by-side air quality comparison between Kollam and Siliguri.
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, Kollam averaged an AQI of 84 while Siliguri averaged 81 — a 3-point (4%) gap, with Kollam the more polluted and Siliguri the cleaner of the two. On 999 days when both cities reported, Siliguri was cleaner on 497 of them; the average daily gap was 47 AQI points.
Seasonality & days
Kollam peaks in January, while Siliguri peaks in February. Kollam logged 0% Severe days and 81% Good-or-Satisfactory days; Siliguri was 0.1% Severe and 61.8% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Siliguri 180 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Siliguri has improved by 39 AQI points (32.5%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Siliguri hit AQI 415 at Ward-32 Bapupara (WBPCB) on 2018-02-08.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Siliguri spans 1 stations with a 0-point spread (min 107, max 107).