Coimbatore vs Kanchipuram
Side-by-side air quality comparison between Coimbatore and Kanchipuram.
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 | Coimbatore | Kanchipuram |
|---|---|---|
| PM2.5(µg/m³) | 2.70 | 9.40 |
| PM10(µg/m³) | 2.90 | 11.10 |
| NO₂(µg/m³) | 4.50 | 10.40 |
| SO₂(µg/m³) | 2.20 | 4.60 |
| O₃(µg/m³) | 43.00 | 44.00 |
| CO(µg/m³) | 159.00 | 243.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Kanchipuram averaged 51 — a 15-point (29%) gap, with Coimbatore the more polluted and Kanchipuram the cleaner of the two. On 105 days when both cities reported, Kanchipuram was cleaner on 83 of them; the average daily gap was 40 AQI points.
Seasonality & days
Coimbatore peaks in November, while Kanchipuram peaks in February. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Kanchipuram was 0% Severe and 94% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Kanchipuram 18 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Kanchipuram has improved by 18 AQI points (26.1%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Kanchipuram hit AQI 320 at Kilambi (TNPCB) on 2023-05-22.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Kanchipuram spans 1 stations with a 0-point spread (min 57, max 57).
Verdict
🏆 Coimbatore has better air quality with an AQI of 5 compared to Kanchipuram's 16.