Aizawl vs Siwan
Side-by-side air quality comparison between Aizawl 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, Aizawl averaged an AQI of 46 while Siwan averaged 148 — a 102-point (222%) gap, with Siwan the more polluted and Aizawl the cleaner of the two. On 723 days when both cities reported, Aizawl was cleaner on 717 of them; the average daily gap was 154 AQI points.
Seasonality & days
Aizawl peaks in March, while Siwan peaks in January. Aizawl logged 0% Severe days and 94.2% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Aizawl 76 days, Siwan 13 days.
Year-over-year progress
Aizawl has worsened by 16 AQI points (53.3%) from 2020 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Aizawl reached AQI 208 at Sikulpuikawn Aizawl (PCB) on 2021-01-20; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Aizawl spans 1 CPCB stations with a 0-point spread (min 43, max 43); Siwan spans 1 stations with a 0-point spread (min 197, max 197).