Ahmedabad vs Coimbatore
Side-by-side air quality comparison between Ahmedabad and Coimbatore.
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 | Coimbatore |
|---|---|---|
| PM2.5(µg/m³) | 22.60 | 2.50 |
| PM10(µg/m³) | 36.90 | 3.00 |
| NO₂(µg/m³) | 7.00 | 4.60 |
| SO₂(µg/m³) | 4.70 | 2.00 |
| O₃(µg/m³) | 40.00 | 40.00 |
| CO(µg/m³) | 159.00 | 163.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ahmedabad averaged an AQI of 117 while Coimbatore averaged 66 — a 51-point (77%) gap, with Ahmedabad the more polluted and Coimbatore the cleaner of the two. On 974 days when both cities reported, Coimbatore was cleaner on 934 of them; the average daily gap was 92 AQI points.
Seasonality & days
Both cities see their worst air in November on average. Ahmedabad logged 0.1% Severe days and 23.7% Good-or-Satisfactory days; Coimbatore was 0% Severe and 90.5% Good-or-Satisfactory. Longest clean-air streaks: Ahmedabad 25 days, Coimbatore 32 days.
Year-over-year progress
Ahmedabad has worsened by 52 AQI points (80%) from 2016 to 2024; Coimbatore has improved by 5 AQI points (7%) over the same window. The worst recorded day for Ahmedabad reached AQI 430 at Raikhad (IITM) on 2023-03-17; Coimbatore hit AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28.
Station-level disparity
Ahmedabad spans 9 CPCB stations with a 44-point spread (min 95, max 139); Coimbatore spans 2 stations with a 1-point spread (min 63, max 64).
Verdict
🏆 Coimbatore has better air quality with an AQI of 4 compared to Ahmedabad's 38.