Dehradun vs Vellore
Side-by-side air quality comparison between Dehradun 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 | Dehradun | Vellore |
|---|---|---|
| PM2.5(µg/m³) | 20.80 | 8.00 |
| PM10(µg/m³) | 20.80 | 10.00 |
| NO₂(µg/m³) | 41.40 | 11.40 |
| SO₂(µg/m³) | 3.80 | 4.50 |
| O₃(µg/m³) | 25.00 | 41.00 |
| CO(µg/m³) | 395.00 | 175.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dehradun averaged an AQI of 106 while Vellore averaged 61 — a 45-point (74%) gap, with Dehradun the more polluted and Vellore the cleaner of the two. On 260 days when both cities reported, Vellore was cleaner on 187 of them; the average daily gap was 52 AQI points.
Seasonality & days
Dehradun peaks in January, while Vellore peaks in December. Dehradun logged 0% Severe days and 62.8% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Dehradun 41 days, Vellore 23 days.
Year-over-year progress
Dehradun has worsened by 19 AQI points (21.8%) from 2022 to 2024; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Dehradun reached AQI 327 at Doon University (UKPCB) on 2024-01-19; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Dehradun spans 1 CPCB stations with a 0-point spread (min 98, max 98); Vellore spans 1 stations with a 0-point spread (min 70, max 70).
Verdict
🏆 Vellore has better air quality with an AQI of 13 compared to Dehradun's 35.