Dehradun vs Karur
Side-by-side air quality comparison between Dehradun and Karur.
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 | Karur |
|---|---|---|
| PM2.5(µg/m³) | 20.80 | 3.80 |
| PM10(µg/m³) | 20.80 | 4.40 |
| NO₂(µg/m³) | 41.40 | 7.30 |
| SO₂(µg/m³) | 3.80 | 2.70 |
| O₃(µg/m³) | 25.00 | 37.00 |
| CO(µg/m³) | 395.00 | 117.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dehradun averaged an AQI of 106 while Karur averaged 71 — a 35-point (49%) gap, with Dehradun the more polluted and Karur the cleaner of the two. On 71 days when both cities reported, Karur was cleaner on 56 of them; the average daily gap was 66 AQI points.
Seasonality & days
Dehradun peaks in January, while Karur peaks in December. Dehradun logged 0% Severe days and 62.8% Good-or-Satisfactory days; Karur was 0% Severe and 80.3% Good-or-Satisfactory. Longest clean-air streaks: Dehradun 41 days, Karur 34 days.
Year-over-year progress
The worst recorded day for Dehradun reached AQI 327 at Doon University (UKPCB) on 2024-01-19; Karur hit AQI 149 at Kamadenu Nagar (TNPCB) on 2024-11-26.
Station-level disparity
Dehradun spans 1 CPCB stations with a 0-point spread (min 98, max 98); Karur spans 1 stations with a 0-point spread (min 71, max 71).
Verdict
🏆 Karur has better air quality with an AQI of 6 compared to Dehradun's 35.