Chennai vs Tirunelveli
Side-by-side air quality comparison between Chennai and Tirunelveli.
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 | Tirunelveli |
|---|---|---|
| PM2.5(µg/m³) | 11.70 | 4.40 |
| PM10(µg/m³) | 13.10 | 5.20 |
| NO₂(µg/m³) | 14.20 | 5.50 |
| SO₂(µg/m³) | 10.10 | 1.80 |
| O₃(µg/m³) | 56.00 | 30.00 |
| CO(µg/m³) | 308.00 | 151.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Tirunelveli averaged 30 — a 38-point (127%) gap, with Chennai the more polluted and Tirunelveli the cleaner of the two. On 119 days when both cities reported, Tirunelveli was cleaner on 117 of them; the average daily gap was 60 AQI points.
Seasonality & days
Chennai peaks in December, while Tirunelveli peaks in October. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Tirunelveli was 0% Severe and 100% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Tirunelveli 31 days.
Year-over-year progress
The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Tirunelveli hit AQI 42 at Municipal Corporation Office (TNPCB) on 2024-10-30.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Tirunelveli spans 1 stations with a 0-point spread (min 30, max 30).
Verdict
🏆 Tirunelveli has better air quality with an AQI of 7 compared to Chennai's 20.