Dewās vs Shillong
Side-by-side air quality comparison between Dewās and Shillong.
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 | Dewās | Shillong |
|---|---|---|
| PM2.5(µg/m³) | 28.60 | 24.90 |
| PM10(µg/m³) | 58.30 | 29.30 |
| NO₂(µg/m³) | 1.00 | 1.20 |
| SO₂(µg/m³) | 6.70 | 4.00 |
| O₃(µg/m³) | 113.00 | 143.00 |
| CO(µg/m³) | 164.00 | 292.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dewās averaged an AQI of 98 while Shillong averaged 75 — a 23-point (31%) gap, with Dewās the more polluted and Shillong the cleaner of the two. On 937 days when both cities reported, Shillong was cleaner on 858 of them; the average daily gap was 59 AQI points.
Seasonality & days
Dewās peaks in December, while Shillong peaks in February. Dewās logged 0% Severe days and 47.7% Good-or-Satisfactory days; Shillong was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Dewās 101 days, Shillong 113 days.
Year-over-year progress
Dewās has improved by 48 AQI points (32.9%) from 2017 to 2024; Shillong has worsened by 41 AQI points (120.6%) over the same window. The worst recorded day for Dewās reached AQI 327 at Bhopal Chauraha (MPPCB) on 2023-07-01; Shillong hit AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19.
Station-level disparity
Dewās spans 1 CPCB stations with a 0-point spread (min 106, max 106); Shillong spans 2 stations with a 2-point spread (min 42, max 44).
Verdict
🏆 Shillong has better air quality with an AQI of 42 compared to Dewās's 59.