Hubli-Dharwad vs Purnia
Side-by-side air quality comparison between Hubli-Dharwad and Purnia.
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 | Hubli-Dharwad | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 5.30 | 105.90 |
| PM10(µg/m³) | 8.40 | 109.00 |
| NO₂(µg/m³) | 5.20 | 25.20 |
| SO₂(µg/m³) | 1.20 | 20.10 |
| O₃(µg/m³) | 39.00 | 67.00 |
| CO(µg/m³) | 117.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Hubli-Dharwad averaged an AQI of 64 while Purnia averaged 133 — a 69-point (108%) gap, with Purnia the more polluted and Hubli-Dharwad the cleaner of the two. On 834 days when both cities reported, Hubli-Dharwad was cleaner on 719 of them; the average daily gap was 99 AQI points.
Seasonality & days
Hubli-Dharwad peaks in February, while Purnia peaks in January. Hubli-Dharwad logged 0% Severe days and 74.1% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Hubli-Dharwad 180 days, Purnia 14 days.
Year-over-year progress
Hubli-Dharwad has improved by 18 AQI points (22%) from 2018 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Hubli-Dharwad reached AQI 500 at Deshpande Nagar (KSPCB) on 2018-05-21; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Hubli-Dharwad spans 2 CPCB stations with a 6-point spread (min 73, max 79); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Hubli-Dharwad has better air quality with an AQI of 9 compared to Purnia's 253. That's a significant difference of 244 points.