Ambala vs Dehradun
Side-by-side air quality comparison between Ambala 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 | Ambala | Dehradun |
|---|---|---|
| PM2.5(µg/m³) | 44.90 | 14.40 |
| PM10(µg/m³) | 117.80 | 14.60 |
| NO₂(µg/m³) | 13.20 | 25.40 |
| SO₂(µg/m³) | 11.50 | 4.10 |
| O₃(µg/m³) | 100.00 | 71.00 |
| CO(µg/m³) | 547.00 | 350.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ambala averaged an AQI of 94 while Dehradun averaged 106 — a 12-point (13%) gap, with Dehradun the more polluted and Ambala the cleaner of the two. On 717 days when both cities reported, Dehradun was cleaner on 409 of them; the average daily gap was 44 AQI points.
Seasonality & days
Ambala peaks in November, while Dehradun peaks in January. Ambala logged 0.2% Severe days and 46.5% Good-or-Satisfactory days; Dehradun was 0% Severe and 62.8% Good-or-Satisfactory. Longest clean-air streaks: Ambala 44 days, Dehradun 41 days.
Year-over-year progress
Ambala has improved by 52 AQI points (35.6%) from 2019 to 2024; Dehradun has worsened by 19 AQI points (21.8%) over the same window. The worst recorded day for Ambala reached AQI 452 at Patti Mehar (HSPCB) on 2020-11-04; Dehradun hit AQI 327 at Doon University (UKPCB) on 2024-01-19.
Station-level disparity
Ambala spans 1 CPCB stations with a 0-point spread (min 126, max 126); Dehradun spans 1 stations with a 0-point spread (min 98, max 98).
Verdict
🏆 Dehradun has better air quality with an AQI of 24 compared to Ambala's 113. That's a significant difference of 89 points.