Dehradun vs Silchar
Side-by-side air quality comparison between Dehradun and Silchar.
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 | Silchar |
|---|---|---|
| PM2.5(µg/m³) | 18.70 | 53.00 |
| PM10(µg/m³) | 18.70 | 63.80 |
| NO₂(µg/m³) | 35.70 | 13.90 |
| SO₂(µg/m³) | 3.50 | 7.50 |
| O₃(µg/m³) | 34.00 | 95.00 |
| CO(µg/m³) | 379.00 | 276.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dehradun averaged an AQI of 106 while Silchar averaged 52 — a 54-point (104%) gap, with Dehradun the more polluted and Silchar the cleaner of the two. On 613 days when both cities reported, Silchar was cleaner on 518 of them; the average daily gap was 58 AQI points.
Seasonality & days
Dehradun peaks in January, while Silchar peaks in February. Dehradun logged 0% Severe days and 62.8% Good-or-Satisfactory days; Silchar was 0% Severe and 100% Good-or-Satisfactory. Longest clean-air streaks: Dehradun 41 days, Silchar 87 days.
Year-over-year progress
Dehradun has worsened by 19 AQI points (21.8%) from 2022 to 2024; Silchar has worsened by 11 AQI points (26.8%) over the same window. The worst recorded day for Dehradun reached AQI 327 at Doon University (UKPCB) on 2024-01-19; Silchar hit AQI 89 at Tarapur (PCBA) on 2023-04-29.
Station-level disparity
Dehradun spans 1 CPCB stations with a 0-point spread (min 98, max 98); Silchar spans 1 stations with a 0-point spread (min 47, max 47).
Verdict
🏆 Dehradun has better air quality with an AQI of 31 compared to Silchar's 89. That's a significant difference of 58 points.