Chennai vs Cuddalore
Side-by-side air quality comparison between Chennai 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 | Chennai | Cuddalore |
|---|---|---|
| PM2.5(µg/m³) | 11.70 | 15.00 |
| PM10(µg/m³) | 13.10 | 18.20 |
| NO₂(µg/m³) | 14.20 | 15.90 |
| SO₂(µg/m³) | 10.10 | 10.00 |
| O₃(µg/m³) | 56.00 | 39.00 |
| CO(µg/m³) | 308.00 | 353.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Cuddalore averaged 52 — a 16-point (31%) gap, with Chennai the more polluted and Cuddalore the cleaner of the two. On 319 days when both cities reported, Cuddalore was cleaner on 281 of them; the average daily gap was 49 AQI points.
Seasonality & days
Chennai peaks in December, while Cuddalore peaks in January. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Cuddalore was 0% Severe and 90.6% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Cuddalore 34 days.
Year-over-year progress
The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Cuddalore hit AQI 329 at Kudikadu (TNPCB) on 2024-04-05.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Cuddalore spans 2 stations with a 11-point spread (min 46, max 57).
Verdict
🏆 Chennai has better air quality with an AQI of 20 compared to Cuddalore's 25.