Ahmedabad vs Shillong
Side-by-side air quality comparison between Ahmedabad 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 | Ahmedabad | Shillong |
|---|---|---|
| CO(ppb) | 913.29 | 292.00 |
| NO2(ppb) | 16.97 | 1.20 |
| O3(ppb) | 2.49 | 143.00 |
| PM10(µg/m³) | 93.43 | 29.30 |
| PM2.5(µg/m³) | 33.21 | 24.90 |
| SO2(ppb) | 1.41 | 4.00 |
| NH3(ppb) | 33.82 | — |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ahmedabad averaged an AQI of 117 while Shillong averaged 75 — a 42-point (56%) gap, with Ahmedabad the more polluted and Shillong the cleaner of the two. On 969 days when both cities reported, Shillong was cleaner on 943 of them; the average daily gap was 103 AQI points.
Seasonality & days
Ahmedabad peaks in November, while Shillong peaks in February. Ahmedabad logged 0.1% Severe days and 23.7% Good-or-Satisfactory days; Shillong was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Ahmedabad 25 days, Shillong 113 days.
Year-over-year progress
Ahmedabad has worsened by 52 AQI points (80%) from 2016 to 2024; Shillong has worsened by 41 AQI points (120.6%) over the same window. The worst recorded day for Ahmedabad reached AQI 430 at Raikhad (IITM) on 2023-03-17; Shillong hit AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19.
Station-level disparity
Ahmedabad spans 9 CPCB stations with a 44-point spread (min 95, max 139); 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 Ahmedabad's 94. That's a significant difference of 52 points.