Thrissur vs Vellore
Side-by-side air quality comparison between Thrissur and Vellore.
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 | Thrissur | Vellore |
|---|---|---|
| PM2.5(µg/m³) | 9.20 | 5.30 |
| PM10(µg/m³) | 11.80 | 6.00 |
| NO₂(µg/m³) | 7.30 | 3.10 |
| SO₂(µg/m³) | 3.00 | 3.30 |
| O₃(µg/m³) | 44.00 | 72.00 |
| CO(µg/m³) | 184.00 | 165.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Thrissur averaged an AQI of 57 while Vellore averaged 61 — a 4-point (7%) gap, with Vellore the more polluted and Thrissur the cleaner of the two. On 240 days when both cities reported, Thrissur was cleaner on 118 of them; the average daily gap was 25 AQI points.
Seasonality & days
Thrissur peaks in February, while Vellore peaks in December. Thrissur logged 0% Severe days and 88.4% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Thrissur 52 days, Vellore 23 days.
Year-over-year progress
Thrissur has improved by 21 AQI points (26.9%) from 2020 to 2024; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Thrissur reached AQI 181 at Corporation Ground Thrissur (PCB) on 2023-01-09; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Thrissur spans 1 CPCB stations with a 0-point spread (min 68, max 68); Vellore spans 1 stations with a 0-point spread (min 70, max 70).
Verdict
🏆 Vellore has better air quality with an AQI of 9 compared to Thrissur's 15.