Ahmedabad vs Chennai
Side-by-side air quality comparison between Ahmedabad and Chennai.
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 | Chennai |
|---|---|---|
| PM2.5(µg/m³) | 23.50 | 11.70 |
| PM10(µg/m³) | 38.60 | 13.10 |
| NO₂(µg/m³) | 6.50 | 14.20 |
| SO₂(µg/m³) | 5.20 | 10.10 |
| O₃(µg/m³) | 41.00 | 56.00 |
| CO(µg/m³) | 163.00 | 308.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ahmedabad averaged an AQI of 117 while Chennai averaged 68 — a 49-point (72%) gap, with Ahmedabad the more polluted and Chennai the cleaner of the two. On 2176 days when both cities reported, Chennai was cleaner on 1568 of them; the average daily gap was 68 AQI points.
Seasonality & days
Ahmedabad peaks in November, while Chennai peaks in December. Ahmedabad logged 0.1% Severe days and 23.7% Good-or-Satisfactory days; Chennai was 0% Severe and 57.5% Good-or-Satisfactory. Longest clean-air streaks: Ahmedabad 25 days, Chennai 53 days.
Year-over-year progress
Ahmedabad has worsened by 52 AQI points (80%) from 2016 to 2024; Chennai has improved by 25 AQI points (26.9%) over the same window. The worst recorded day for Ahmedabad reached AQI 430 at Raikhad (IITM) on 2023-03-17; Chennai hit AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14.
Station-level disparity
Ahmedabad spans 9 CPCB stations with a 44-point spread (min 95, max 139); Chennai spans 9 stations with a 27-point spread (min 63, max 90).
Verdict
🏆 Chennai has better air quality with an AQI of 20 compared to Ahmedabad's 39.