Asansol vs Dehradun
Side-by-side air quality comparison between Asansol 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 | Asansol | Dehradun |
|---|---|---|
| PM2.5(µg/m³) | 89.60 | 20.80 |
| PM10(µg/m³) | 95.50 | 20.80 |
| NO₂(µg/m³) | 48.70 | 41.40 |
| SO₂(µg/m³) | 82.10 | 3.80 |
| O₃(µg/m³) | 39.00 | 25.00 |
| CO(µg/m³) | 708.00 | 395.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Asansol averaged an AQI of 145 while Dehradun averaged 106 — a 39-point (37%) gap, with Asansol the more polluted and Dehradun the cleaner of the two. On 492 days when both cities reported, Dehradun was cleaner on 396 of them; the average daily gap was 75 AQI points.
Seasonality & days
Asansol peaks in December, while Dehradun peaks in January. Asansol logged 0% Severe days and 43.3% Good-or-Satisfactory days; Dehradun was 0% Severe and 62.8% Good-or-Satisfactory. Longest clean-air streaks: Asansol 44 days, Dehradun 41 days.
Year-over-year progress
Asansol has worsened by 12 AQI points (9%) from 2018 to 2024; Dehradun has worsened by 19 AQI points (21.8%) over the same window. The worst recorded day for Asansol reached AQI 394 at Court Area (WBPCB) on 2022-12-13; Dehradun hit AQI 327 at Doon University (UKPCB) on 2024-01-19.
Station-level disparity
Asansol spans 4 CPCB stations with a 40-point spread (min 123, max 163); Dehradun spans 1 stations with a 0-point spread (min 98, max 98).
Verdict
🏆 Dehradun has better air quality with an AQI of 35 compared to Asansol's 199. That's a significant difference of 164 points.