Dhanbad vs Siwan
Side-by-side air quality comparison between Dhanbad 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 | Dhanbad | Siwan |
|---|---|---|
| PM2.5(µg/m³) | 92.20 | 108.00 |
| PM10(µg/m³) | 100.10 | 122.50 |
| NO₂(µg/m³) | 60.10 | 59.80 |
| SO₂(µg/m³) | 187.20 | 14.10 |
| O₃(µg/m³) | 36.00 | 4.00 |
| CO(µg/m³) | 755.00 | 856.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dhanbad averaged an AQI of 161 while Siwan averaged 148 — a 13-point (9%) gap, with Dhanbad the more polluted and Siwan the cleaner of the two. On 119 days when both cities reported, Siwan was cleaner on 76 of them; the average daily gap was 63 AQI points.
Seasonality & days
Dhanbad peaks in November, while Siwan peaks in January. Dhanbad logged 0.4% Severe days and 3.1% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Dhanbad 2 days, Siwan 13 days.
Year-over-year progress
The worst recorded day for Dhanbad reached AQI 436 at Kalakusuma (DMC) on 2024-04-28; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Dhanbad spans 2 CPCB stations with a 12-point spread (min 156, max 168); Siwan spans 1 stations with a 0-point spread (min 197, max 197).
Verdict
🏆 Dhanbad has better air quality with an AQI of 208 compared to Siwan's 260. That's a significant difference of 52 points.