Cuddalore vs Dehradun
Side-by-side air quality comparison between Cuddalore and Dehradun.
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 | Cuddalore | Dehradun |
|---|---|---|
| PM2.5(µg/m³) | 13.70 | 20.80 |
| PM10(µg/m³) | 17.10 | 20.80 |
| NO₂(µg/m³) | 16.80 | 41.40 |
| SO₂(µg/m³) | 7.60 | 3.80 |
| O₃(µg/m³) | 36.00 | 25.00 |
| CO(µg/m³) | 425.00 | 395.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Cuddalore averaged an AQI of 52 while Dehradun averaged 106 — a 54-point (104%) gap, with Dehradun the more polluted and Cuddalore the cleaner of the two. On 304 days when both cities reported, Cuddalore was cleaner on 232 of them; the average daily gap was 58 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Cuddalore logged 0% Severe days and 90.6% Good-or-Satisfactory days; Dehradun was 0% Severe and 62.8% Good-or-Satisfactory. Longest clean-air streaks: Cuddalore 34 days, Dehradun 41 days.
Year-over-year progress
The worst recorded day for Cuddalore reached AQI 329 at Kudikadu (TNPCB) on 2024-04-05; Dehradun hit AQI 327 at Doon University (UKPCB) on 2024-01-19.
Station-level disparity
Cuddalore spans 2 CPCB stations with a 11-point spread (min 46, max 57); Dehradun spans 1 stations with a 0-point spread (min 98, max 98).
Verdict
🏆 Cuddalore has better air quality with an AQI of 23 compared to Dehradun's 35.