Chennai vs Thane
Side-by-side air quality comparison between Chennai and Thane.
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 | Thane |
|---|---|---|
| PM2.5(µg/m³) | 11.70 | 17.50 |
| PM10(µg/m³) | 13.10 | 40.70 |
| NO₂(µg/m³) | 14.20 | 11.00 |
| SO₂(µg/m³) | 10.10 | 12.60 |
| O₃(µg/m³) | 56.00 | 42.00 |
| CO(µg/m³) | 308.00 | 171.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Thane averaged 95 — a 27-point (40%) gap, with Thane the more polluted and Chennai the cleaner of the two. On 361 days when both cities reported, Thane was cleaner on 192 of them; the average daily gap was 51 AQI points.
Seasonality & days
Chennai peaks in December, while Thane peaks in January. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Thane was 0% Severe and 53.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Thane 99 days.
Year-over-year progress
The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Thane hit AQI 302 at Kasarvadavali (MPCB) on 2024-03-21.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Thane spans 2 stations with a 9-point spread (min 90, max 99).
Verdict
🏆 Chennai has better air quality with an AQI of 20 compared to Thane's 41.