Bettiah vs Siwan
Side-by-side air quality comparison between Bettiah 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, Bettiah averaged an AQI of 127 while Siwan averaged 148 — a 21-point (17%) gap, with Siwan the more polluted and Bettiah the cleaner of the two. On 596 days when both cities reported, Bettiah was cleaner on 339 of them; the average daily gap was 52 AQI points.
Seasonality & days
Bettiah peaks in November, while Siwan peaks in January. Bettiah logged 3.2% Severe days and 32.3% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Bettiah 20 days, Siwan 13 days.
Year-over-year progress
Bettiah has improved by 73 AQI points (36.5%) from 2021 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Bettiah reached AQI 470 at Kamalnath Nagar (BSPCB) on 2023-01-01; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Bettiah spans 1 CPCB stations with a 0-point spread (min 173, max 173); Siwan spans 1 stations with a 0-point spread (min 197, max 197).