Bangalore vs Siwan
Side-by-side air quality comparison between Bangalore and Siwan.
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 | Siwan |
|---|---|---|
| PM2.5(µg/m³) | 5.10 | 108.00 |
| PM10(µg/m³) | 6.00 | 122.50 |
| NO₂(µg/m³) | 9.70 | 59.80 |
| SO₂(µg/m³) | 4.50 | 14.10 |
| O₃(µg/m³) | 34.00 | 4.00 |
| CO(µg/m³) | 230.00 | 856.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bangalore averaged an AQI of 74 while Siwan averaged 148 — a 74-point (100%) gap, with Siwan the more polluted and Bangalore the cleaner of the two. On 809 days when both cities reported, Bangalore was cleaner on 580 of them; the average daily gap was 98 AQI points.
Seasonality & days
Bangalore peaks in March, while Siwan peaks in January. Bangalore logged 0.5% Severe days and 42.6% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Bangalore 31 days, Siwan 13 days.
Year-over-year progress
Bangalore has improved by 26 AQI points (26%) from 2016 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Bangalore reached AQI 500 at Silk Board (KSPCB) on 2024-01-10; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Bangalore spans 14 CPCB stations with a 50-point spread (min 49, max 99); Siwan spans 1 stations with a 0-point spread (min 197, max 197).
Verdict
🏆 Bangalore has better air quality with an AQI of 9 compared to Siwan's 260. That's a significant difference of 251 points.