Coimbatore vs Cuddalore
Side-by-side air quality comparison between Coimbatore and Cuddalore.
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 | Cuddalore |
|---|---|---|
| PM2.5(µg/m³) | 2.70 | 15.00 |
| PM10(µg/m³) | 2.90 | 18.20 |
| NO₂(µg/m³) | 4.50 | 15.90 |
| SO₂(µg/m³) | 2.20 | 10.00 |
| O₃(µg/m³) | 43.00 | 39.00 |
| CO(µg/m³) | 159.00 | 353.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Cuddalore averaged 52 — a 14-point (27%) gap, with Coimbatore the more polluted and Cuddalore the cleaner of the two. On 254 days when both cities reported, Cuddalore was cleaner on 166 of them; the average daily gap was 29 AQI points.
Seasonality & days
Coimbatore peaks in November, while Cuddalore peaks in January. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Cuddalore was 0% Severe and 90.6% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Cuddalore 34 days.
Year-over-year progress
The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Cuddalore hit AQI 329 at Kudikadu (TNPCB) on 2024-04-05.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Cuddalore spans 2 stations with a 11-point spread (min 46, max 57).
Verdict
🏆 Coimbatore has better air quality with an AQI of 5 compared to Cuddalore's 25.