Coimbatore vs Thrissur
Side-by-side air quality comparison between Coimbatore 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 | Coimbatore | Thrissur |
|---|---|---|
| PM2.5(µg/m³) | 2.40 | 8.20 |
| PM10(µg/m³) | 2.70 | 9.70 |
| NO₂(µg/m³) | 4.70 | 10.20 |
| SO₂(µg/m³) | 2.10 | 3.20 |
| O₃(µg/m³) | 40.00 | 26.00 |
| CO(µg/m³) | 154.00 | 146.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Thrissur averaged 57 — a 9-point (16%) gap, with Coimbatore the more polluted and Thrissur the cleaner of the two. On 472 days when both cities reported, Coimbatore was cleaner on 237 of them; the average daily gap was 25 AQI points.
Seasonality & days
Coimbatore peaks in November, while Thrissur peaks in February. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Thrissur was 0% Severe and 88.4% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Thrissur 52 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Thrissur has improved by 21 AQI points (26.9%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Thrissur hit AQI 181 at Corporation Ground Thrissur (PCB) on 2023-01-09.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Thrissur spans 1 stations with a 0-point spread (min 68, max 68).
Verdict
🏆 Coimbatore has better air quality with an AQI of 4 compared to Thrissur's 14.