Chennai vs Kannur
Side-by-side air quality comparison between Chennai and Kannur.
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 | Kannur |
|---|---|---|
| PM2.5(µg/m³) | 11.70 | 5.70 |
| PM10(µg/m³) | 13.10 | 11.30 |
| NO₂(µg/m³) | 14.20 | 3.30 |
| SO₂(µg/m³) | 10.10 | 1.10 |
| O₃(µg/m³) | 56.00 | 51.00 |
| CO(µg/m³) | 308.00 | 153.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Kannur averaged 65 — a 3-point (5%) gap, with Chennai the more polluted and Kannur the cleaner of the two. On 1174 days when both cities reported, Kannur was cleaner on 975 of them; the average daily gap was 45 AQI points.
Seasonality & days
Chennai peaks in December, while Kannur peaks in February. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Kannur was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Kannur 103 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Kannur has worsened by 11 AQI points (20.4%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Kannur hit AQI 258 at Thavakkara Kannur (PCB) on 2021-04-14.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Kannur spans 1 stations with a 0-point spread (min 66, max 66).
Verdict
🏆 Kannur has better air quality with an AQI of 11 compared to Chennai's 20.