Bangalore vs Purnia
Side-by-side air quality comparison between Bangalore 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 | Bangalore | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 5.10 | 105.90 |
| PM10(µg/m³) | 5.60 | 109.00 |
| NO₂(µg/m³) | 9.50 | 25.20 |
| SO₂(µg/m³) | 4.20 | 20.10 |
| O₃(µg/m³) | 35.00 | 67.00 |
| CO(µg/m³) | 290.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bangalore averaged an AQI of 74 while Purnia averaged 133 — a 59-point (80%) gap, with Purnia the more polluted and Bangalore the cleaner of the two. On 884 days when both cities reported, Bangalore was cleaner on 533 of them; the average daily gap was 86 AQI points.
Seasonality & days
Bangalore peaks in March, while Purnia peaks in January. Bangalore logged 0.5% Severe days and 42.6% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Bangalore 31 days, Purnia 14 days.
Year-over-year progress
Bangalore has improved by 26 AQI points (26%) from 2016 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Bangalore reached AQI 500 at Silk Board (KSPCB) on 2024-01-10; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Bangalore spans 14 CPCB stations with a 50-point spread (min 49, max 99); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Bangalore has better air quality with an AQI of 9 compared to Purnia's 253. That's a significant difference of 244 points.