Dehradun vs Ulhasnagar
Side-by-side air quality comparison between Dehradun and Ulhasnagar.
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 | Ulhasnagar |
|---|---|---|
| PM2.5(µg/m³) | 20.80 | 22.10 |
| PM10(µg/m³) | 20.80 | 40.40 |
| NO₂(µg/m³) | 41.40 | 23.10 |
| SO₂(µg/m³) | 3.80 | 21.70 |
| O₃(µg/m³) | 25.00 | 19.00 |
| CO(µg/m³) | 395.00 | 208.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dehradun averaged an AQI of 106 while Ulhasnagar averaged 117 — a 11-point (10%) gap, with Ulhasnagar the more polluted and Dehradun the cleaner of the two. On 468 days when both cities reported, Dehradun was cleaner on 292 of them; the average daily gap was 52 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Dehradun logged 0% Severe days and 62.8% Good-or-Satisfactory days; Ulhasnagar was 0% Severe and 46.9% Good-or-Satisfactory. Longest clean-air streaks: Dehradun 41 days, Ulhasnagar 74 days.
Year-over-year progress
Dehradun has worsened by 19 AQI points (21.8%) from 2022 to 2024; Ulhasnagar has improved by 10 AQI points (7.9%) over the same window. The worst recorded day for Dehradun reached AQI 327 at Doon University (UKPCB) on 2024-01-19; Ulhasnagar hit AQI 319 at Sidhi Vinayak Nagar (MPCB) on 2023-11-13.
Station-level disparity
Dehradun spans 1 CPCB stations with a 0-point spread (min 98, max 98); Ulhasnagar spans 1 stations with a 0-point spread (min 120, max 120).
Verdict
🏆 Dehradun has better air quality with an AQI of 35 compared to Ulhasnagar's 40.