Ahmedabad vs Siwan
Side-by-side air quality comparison between Ahmedabad and Siwan.
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 | Siwan |
|---|---|---|
| PM2.5(µg/m³) | 23.50 | 114.60 |
| PM10(µg/m³) | 38.60 | 125.70 |
| NO₂(µg/m³) | 6.50 | 44.50 |
| SO₂(µg/m³) | 5.20 | 15.40 |
| O₃(µg/m³) | 41.00 | 54.00 |
| CO(µg/m³) | 163.00 | 761.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ahmedabad averaged an AQI of 117 while Siwan averaged 148 — a 31-point (26%) gap, with Siwan the more polluted and Ahmedabad the cleaner of the two. On 807 days when both cities reported, Ahmedabad was cleaner on 445 of them; the average daily gap was 88 AQI points.
Seasonality & days
Ahmedabad peaks in November, while Siwan peaks in January. Ahmedabad logged 0.1% Severe days and 23.7% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Ahmedabad 25 days, Siwan 13 days.
Year-over-year progress
Ahmedabad has worsened by 52 AQI points (80%) from 2016 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Ahmedabad reached AQI 430 at Raikhad (IITM) on 2023-03-17; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Ahmedabad spans 9 CPCB stations with a 44-point spread (min 95, max 139); Siwan spans 1 stations with a 0-point spread (min 197, max 197).
Verdict
🏆 Ahmedabad has better air quality with an AQI of 39 compared to Siwan's 282. That's a significant difference of 243 points.