Dehradun vs Gummidipoondi
Side-by-side air quality comparison between Dehradun and Gummidipoondi.
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 | Gummidipoondi |
|---|---|---|
| PM2.5(µg/m³) | 34.00 | 7.70 |
| PM10(µg/m³) | 110.40 | 10.90 |
| NO₂(µg/m³) | 0.80 | 2.40 |
| SO₂(µg/m³) | 7.90 | 7.40 |
| O₃(µg/m³) | 168.00 | 108.00 |
| CO(µg/m³) | 263.00 | 145.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dehradun averaged an AQI of 106 while Gummidipoondi averaged 107 — a 1-point (1%) gap, with Gummidipoondi the more polluted and Dehradun the cleaner of the two. On 642 days when both cities reported, Dehradun was cleaner on 348 of them; the average daily gap was 51 AQI points.
Seasonality & days
Dehradun peaks in January, while Gummidipoondi peaks in November. Dehradun logged 0% Severe days and 62.8% Good-or-Satisfactory days; Gummidipoondi was 0% Severe and 59.1% Good-or-Satisfactory. Longest clean-air streaks: Dehradun 41 days, Gummidipoondi 49 days.
Year-over-year progress
Dehradun has worsened by 19 AQI points (21.8%) from 2022 to 2024; Gummidipoondi has worsened by 8 AQI points (8.1%) over the same window. The worst recorded day for Dehradun reached AQI 327 at Doon University (UKPCB) on 2024-01-19; Gummidipoondi hit AQI 326 at Anthoni Pillai Nagar (TNPCB) on 2023-12-22.
Station-level disparity
Dehradun spans 1 CPCB stations with a 0-point spread (min 98, max 98); Gummidipoondi spans 1 stations with a 0-point spread (min 99, max 99).
Verdict
🏆 Gummidipoondi has better air quality with an AQI of 13 compared to Dehradun's 108. That's a significant difference of 95 points.