Chennai vs Pune
Side-by-side air quality comparison between Chennai and Pune.
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 | Pune |
|---|---|---|
| PM2.5(µg/m³) | 11.70 | 16.30 |
| PM10(µg/m³) | 13.10 | 35.50 |
| NO₂(µg/m³) | 14.20 | 10.00 |
| SO₂(µg/m³) | 10.10 | 9.20 |
| O₃(µg/m³) | 56.00 | 36.00 |
| CO(µg/m³) | 308.00 | 152.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Pune averaged 97 — a 29-point (43%) gap, with Pune the more polluted and Chennai the cleaner of the two. On 1995 days when both cities reported, Chennai was cleaner on 1100 of them; the average daily gap was 60 AQI points.
Seasonality & days
Chennai peaks in December, while Pune peaks in November. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Pune was 0.1% Severe and 44.8% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Pune 92 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Pune has improved by 7 AQI points (6.7%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Pune hit AQI 435 at Alandi (IITM) on 2024-01-29.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Pune spans 12 stations with a 54-point spread (min 68, max 122).
Verdict
🏆 Chennai has better air quality with an AQI of 20 compared to Pune's 36.