Chandigarh vs Coimbatore
Side-by-side air quality comparison between Chandigarh 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 | Chandigarh | Coimbatore |
|---|---|---|
| PM2.5(µg/m³) | 50.90 | 2.50 |
| PM10(µg/m³) | 66.80 | 3.00 |
| NO₂(µg/m³) | 44.60 | 4.60 |
| SO₂(µg/m³) | 8.10 | 2.00 |
| O₃(µg/m³) | 11.00 | 40.00 |
| CO(µg/m³) | 714.00 | 163.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chandigarh averaged an AQI of 153 while Coimbatore averaged 66 — a 87-point (132%) gap, with Chandigarh the more polluted and Coimbatore the cleaner of the two. On 946 days when both cities reported, Coimbatore was cleaner on 799 of them; the average daily gap was 85 AQI points.
Seasonality & days
Chandigarh peaks in January, while Coimbatore peaks in November. Chandigarh logged 0.3% Severe days and 39.9% Good-or-Satisfactory days; Coimbatore was 0% Severe and 90.5% Good-or-Satisfactory. Longest clean-air streaks: Chandigarh 92 days, Coimbatore 32 days.
Year-over-year progress
Chandigarh has worsened by 27 AQI points (21.4%) from 2019 to 2024; Coimbatore has improved by 5 AQI points (7%) over the same window. The worst recorded day for Chandigarh reached AQI 452 at Sector-53 (CPCC) on 2022-11-09; Coimbatore hit AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28.
Station-level disparity
Chandigarh spans 3 CPCB stations with a 43-point spread (min 107, max 150); 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 Chandigarh's 85. That's a significant difference of 81 points.