Dehradun vs Kolār
Side-by-side air quality comparison between Dehradun and Kolār.
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 | Kolār |
|---|---|---|
| PM2.5(µg/m³) | 20.80 | 5.90 |
| PM10(µg/m³) | 20.80 | 7.20 |
| NO₂(µg/m³) | 41.40 | 10.90 |
| SO₂(µg/m³) | 3.80 | 4.70 |
| O₃(µg/m³) | 25.00 | 35.00 |
| CO(µg/m³) | 395.00 | 189.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dehradun averaged an AQI of 106 while Kolār averaged 65 — a 41-point (63%) gap, with Dehradun the more polluted and Kolār the cleaner of the two. On 416 days when both cities reported, Kolār was cleaner on 259 of them; the average daily gap was 54 AQI points.
Seasonality & days
Dehradun peaks in January, while Kolār peaks in September. Dehradun logged 0% Severe days and 62.8% Good-or-Satisfactory days; Kolār was 0.9% Severe and 85.30000000000001% Good-or-Satisfactory. Longest clean-air streaks: Dehradun 41 days, Kolār 17 days.
Year-over-year progress
Dehradun has worsened by 19 AQI points (21.8%) from 2022 to 2024; Kolār has improved by 56 AQI points (46.3%) over the same window. The worst recorded day for Dehradun reached AQI 327 at Doon University (UKPCB) on 2024-01-19; Kolār hit AQI 500 at Tamaka Ind Area (KSPCB) on 2018-09-18.
Station-level disparity
Dehradun spans 1 CPCB stations with a 0-point spread (min 98, max 98); Kolār spans 1 stations with a 0-point spread (min 71, max 71).
Verdict
🏆 Kolār has better air quality with an AQI of 10 compared to Dehradun's 35.