Chennai vs Hubli-Dharwad
Side-by-side air quality comparison between Chennai and Hubli-Dharwad.
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 | Hubli-Dharwad |
|---|---|---|
| PM2.5(µg/m³) | 11.70 | 5.30 |
| PM10(µg/m³) | 13.10 | 8.40 |
| NO₂(µg/m³) | 14.20 | 5.20 |
| SO₂(µg/m³) | 10.10 | 1.20 |
| O₃(µg/m³) | 56.00 | 39.00 |
| CO(µg/m³) | 308.00 | 117.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Hubli-Dharwad averaged 64 — a 4-point (6%) gap, with Chennai the more polluted and Hubli-Dharwad the cleaner of the two. On 1709 days when both cities reported, Hubli-Dharwad was cleaner on 1290 of them; the average daily gap was 46 AQI points.
Seasonality & days
Chennai peaks in December, while Hubli-Dharwad peaks in February. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Hubli-Dharwad was 0% Severe and 74.1% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Hubli-Dharwad 180 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Hubli-Dharwad has improved by 18 AQI points (22%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Hubli-Dharwad hit AQI 500 at Deshpande Nagar (KSPCB) on 2018-05-21.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Hubli-Dharwad spans 2 stations with a 6-point spread (min 73, max 79).
Verdict
🏆 Hubli-Dharwad has better air quality with an AQI of 9 compared to Chennai's 20.