Bihar Sharif vs Siwan
Side-by-side air quality comparison between Bihar Sharif 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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bihar Sharif averaged an AQI of 115 while Siwan averaged 148 — a 33-point (29%) gap, with Siwan the more polluted and Bihar Sharif the cleaner of the two. On 664 days when both cities reported, Bihar Sharif was cleaner on 476 of them; the average daily gap was 69 AQI points.
Seasonality & days
Bihar Sharif peaks in December, while Siwan peaks in January. Bihar Sharif logged 1% Severe days and 39.1% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Bihar Sharif 32 days, Siwan 13 days.
Year-over-year progress
Bihar Sharif has improved by 138 AQI points (54.5%) from 2021 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Bihar Sharif reached AQI 433 at D M Colony Bihar (BSPCB) on 2021-12-24; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Bihar Sharif spans 1 CPCB stations with a 0-point spread (min 146, max 146); Siwan spans 1 stations with a 0-point spread (min 197, max 197).