Dehradun vs Saharsa
Side-by-side air quality comparison between Dehradun and Saharsa.
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 | Saharsa |
|---|---|---|
| PM2.5(µg/m³) | 20.80 | 100.60 |
| PM10(µg/m³) | 20.80 | 109.00 |
| NO₂(µg/m³) | 41.40 | 40.40 |
| SO₂(µg/m³) | 3.80 | 12.20 |
| O₃(µg/m³) | 25.00 | 21.00 |
| CO(µg/m³) | 395.00 | 719.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dehradun averaged an AQI of 106 while Saharsa averaged 139 — a 33-point (31%) gap, with Saharsa the more polluted and Dehradun the cleaner of the two. On 651 days when both cities reported, Dehradun was cleaner on 502 of them; the average daily gap was 86 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; Saharsa was 1.4% Severe and 28.4% Good-or-Satisfactory. Longest clean-air streaks: Dehradun 41 days, Saharsa 20 days.
Year-over-year progress
Dehradun has worsened by 19 AQI points (21.8%) from 2022 to 2024; Saharsa has improved by 139 AQI points (50%) over the same window. The worst recorded day for Dehradun reached AQI 327 at Doon University (UKPCB) on 2024-01-19; Saharsa hit AQI 454 at Police Line (BSPCB) on 2022-12-13.
Station-level disparity
Dehradun spans 1 CPCB stations with a 0-point spread (min 98, max 98); Saharsa spans 1 stations with a 0-point spread (min 188, max 188).
Verdict
🏆 Dehradun has better air quality with an AQI of 35 compared to Saharsa's 236. That's a significant difference of 201 points.