Kollam vs Thrissur
Side-by-side air quality comparison between Kollam and Thrissur.
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
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Kollam | Thrissur |
|---|---|---|
| PM2.5(µg/m³) | 5.50 | 8.60 |
| PM10(µg/m³) | 7.90 | 10.10 |
| NO₂(µg/m³) | 3.80 | 9.80 |
| SO₂(µg/m³) | 1.60 | 3.30 |
| O₃(µg/m³) | 33.00 | 29.00 |
| CO(µg/m³) | 96.00 | 163.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kollam averaged an AQI of 84 while Thrissur averaged 57 — a 27-point (47%) gap, with Kollam the more polluted and Thrissur the cleaner of the two. On 983 days when both cities reported, Thrissur was cleaner on 705 of them; the average daily gap was 28 AQI points.
Seasonality & days
Kollam peaks in January, while Thrissur peaks in February. Kollam logged 0% Severe days and 81% Good-or-Satisfactory days; Thrissur was 0% Severe and 88.4% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Thrissur 52 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Thrissur has improved by 21 AQI points (26.9%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Thrissur hit AQI 181 at Corporation Ground Thrissur (PCB) on 2023-01-09.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Thrissur spans 1 stations with a 0-point spread (min 68, max 68).
Verdict
🏆 Kollam has better air quality with an AQI of 9 compared to Thrissur's 14.