Guwahati vs Siwan
Side-by-side air quality comparison between Guwahati 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, Guwahati averaged an AQI of 123 while Siwan averaged 148 — a 25-point (20%) gap, with Siwan the more polluted and Guwahati the cleaner of the two. On 805 days when both cities reported, Guwahati was cleaner on 518 of them; the average daily gap was 85 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Guwahati logged 0.1% Severe days and 44.9% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Guwahati 105 days, Siwan 13 days.
Year-over-year progress
Guwahati has worsened by 14 AQI points (12.8%) from 2019 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Guwahati reached AQI 420 at Railway Colony (PCBA) on 2023-01-15; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Guwahati spans 4 CPCB stations with a 26-point spread (min 118, max 144); Siwan spans 1 stations with a 0-point spread (min 197, max 197).