Dehradun vs Hosur
Side-by-side air quality comparison between Dehradun and Hosur.
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 | Hosur |
|---|---|---|
| PM2.5(µg/m³) | 20.80 | 5.00 |
| PM10(µg/m³) | 20.80 | 6.00 |
| NO₂(µg/m³) | 41.40 | 9.20 |
| SO₂(µg/m³) | 3.80 | 4.50 |
| O₃(µg/m³) | 25.00 | 37.00 |
| CO(µg/m³) | 395.00 | 147.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dehradun averaged an AQI of 106 while Hosur averaged 90 — a 16-point (18%) gap, with Dehradun the more polluted and Hosur the cleaner of the two. On 49 days when both cities reported, Dehradun was cleaner on 31 of them; the average daily gap was 38 AQI points.
Seasonality & days
Dehradun peaks in January, while Hosur peaks in December. Dehradun logged 0% Severe days and 62.8% Good-or-Satisfactory days; Hosur was 0% Severe and 73.89999999999999% Good-or-Satisfactory. Longest clean-air streaks: Dehradun 41 days, Hosur 10 days.
Year-over-year progress
The worst recorded day for Dehradun reached AQI 327 at Doon University (UKPCB) on 2024-01-19; Hosur hit AQI 232 at SIPCOT Phase-1 (TNPCB) on 2022-10-25.
Station-level disparity
Dehradun spans 1 CPCB stations with a 0-point spread (min 98, max 98); Hosur spans 1 stations with a 0-point spread (min 90, max 90).
Verdict
🏆 Hosur has better air quality with an AQI of 8 compared to Dehradun's 35.