Chandigarh vs Siwan
Side-by-side air quality comparison between Chandigarh 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, Chandigarh averaged an AQI of 153 while Siwan averaged 148 — a 5-point (3%) gap, with Chandigarh the more polluted and Siwan the cleaner of the two. On 808 days when both cities reported, Chandigarh was cleaner on 466 of them; the average daily gap was 82 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Chandigarh logged 0.3% Severe days and 39.9% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Chandigarh 92 days, Siwan 13 days.
Year-over-year progress
Chandigarh has worsened by 27 AQI points (21.4%) from 2019 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Chandigarh reached AQI 452 at Sector-53 (CPCC) on 2022-11-09; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Chandigarh spans 3 CPCB stations with a 43-point spread (min 107, max 150); Siwan spans 1 stations with a 0-point spread (min 197, max 197).