Kollam vs Tiruchirappalli
Side-by-side air quality comparison between Kollam and Tiruchirappalli.
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 Tiruchirappalli averaged 50 — a 34-point (68%) gap, with Kollam the more polluted and Tiruchirappalli the cleaner of the two. On 65 days when both cities reported, Tiruchirappalli was cleaner on 50 of them; the average daily gap was 36 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Kollam logged 0% Severe days and 81% Good-or-Satisfactory days; Tiruchirappalli was 0% Severe and 96.5% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Tiruchirappalli 46 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Tiruchirappalli has improved by 23 AQI points (31.5%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Tiruchirappalli hit AQI 114 at St Joseph College (TNPCB) on 2024-01-14.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Tiruchirappalli spans 1 stations with a 0-point spread (min 52, max 52).