Saharsa vs Siwan
Side-by-side air quality comparison between Saharsa 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, Saharsa averaged an AQI of 139 while Siwan averaged 148 — a 9-point (6%) gap, with Siwan the more polluted and Saharsa the cleaner of the two. On 674 days when both cities reported, Saharsa was cleaner on 376 of them; the average daily gap was 63 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Saharsa logged 1.4% Severe days and 28.4% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Saharsa 20 days, Siwan 13 days.
Year-over-year progress
Saharsa has improved by 139 AQI points (50%) from 2021 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Saharsa reached AQI 454 at Police Line (BSPCB) on 2022-12-13; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Saharsa spans 1 CPCB stations with a 0-point spread (min 188, max 188); Siwan spans 1 stations with a 0-point spread (min 197, max 197).