Dehradun vs Ludhiana
Side-by-side air quality comparison between Dehradun and Ludhiana.
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 | Ludhiana |
|---|---|---|
| PM2.5(µg/m³) | 14.40 | 71.50 |
| PM10(µg/m³) | 14.60 | 100.40 |
| NO₂(µg/m³) | 25.40 | 31.30 |
| SO₂(µg/m³) | 4.10 | 17.00 |
| O₃(µg/m³) | 71.00 | 62.00 |
| CO(µg/m³) | 350.00 | 748.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dehradun averaged an AQI of 106 while Ludhiana averaged 117 — a 11-point (10%) gap, with Ludhiana the more polluted and Dehradun the cleaner of the two.
Seasonality & days
Dehradun peaks in January, while Ludhiana peaks in November. Dehradun logged 0% Severe days and 62.8% Good-or-Satisfactory days; Ludhiana was 0.3% Severe and 53.599999999999994% Good-or-Satisfactory. Longest clean-air streaks: Dehradun 41 days, Ludhiana 53 days.
Year-over-year progress
Dehradun has worsened by 19 AQI points (21.8%) from 2022 to 2024; Ludhiana has improved by 79 AQI points (40.3%) over the same window. The worst recorded day for Dehradun reached AQI 327 at Doon University (UKPCB) on 2024-01-19; Ludhiana hit AQI 488 at Punjab Agricultural University (PPCB) on 2018-06-14.
Station-level disparity
Dehradun spans 1 CPCB stations with a 0-point spread (min 98, max 98); Ludhiana spans 1 stations with a 0-point spread (min 118, max 118).
Verdict
🏆 Dehradun has better air quality with an AQI of 24 compared to Ludhiana's 139. That's a significant difference of 115 points.