Dehradun vs Thrissur
Side-by-side air quality comparison between Dehradun 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 | Dehradun | Thrissur |
|---|---|---|
| PM2.5(µg/m³) | 14.40 | 8.60 |
| PM10(µg/m³) | 14.60 | 10.10 |
| NO₂(µg/m³) | 25.40 | 9.80 |
| SO₂(µg/m³) | 4.10 | 3.30 |
| O₃(µg/m³) | 71.00 | 29.00 |
| CO(µg/m³) | 350.00 | 163.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dehradun averaged an AQI of 106 while Thrissur averaged 57 — a 49-point (86%) gap, with Dehradun the more polluted and Thrissur the cleaner of the two. On 620 days when both cities reported, Thrissur was cleaner on 430 of them; the average daily gap was 50 AQI points.
Seasonality & days
Dehradun peaks in January, while Thrissur peaks in February. Dehradun logged 0% Severe days and 62.8% Good-or-Satisfactory days; Thrissur was 0% Severe and 88.4% Good-or-Satisfactory. Longest clean-air streaks: Dehradun 41 days, Thrissur 52 days.
Year-over-year progress
Dehradun has worsened by 19 AQI points (21.8%) from 2022 to 2024; Thrissur has improved by 21 AQI points (26.9%) over the same window. The worst recorded day for Dehradun reached AQI 327 at Doon University (UKPCB) on 2024-01-19; Thrissur hit AQI 181 at Corporation Ground Thrissur (PCB) on 2023-01-09.
Station-level disparity
Dehradun spans 1 CPCB stations with a 0-point spread (min 98, max 98); Thrissur spans 1 stations with a 0-point spread (min 68, max 68).
Verdict
🏆 Thrissur has better air quality with an AQI of 14 compared to Dehradun's 24.