Delhi vs Siwan
Side-by-side air quality comparison between Delhi 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, Delhi averaged an AQI of 210 while Siwan averaged 148 — a 62-point (42%) gap, with Delhi the more polluted and Siwan the cleaner of the two. On 809 days when both cities reported, Siwan was cleaner on 712 of them; the average daily gap was 131 AQI points.
Seasonality & days
Delhi peaks in November, while Siwan peaks in January. Delhi logged 18.7% Severe days and 1.7% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Delhi 3 days, Siwan 13 days.
Year-over-year progress
Delhi has improved by 42 AQI points (16.7%) from 2016 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Delhi reached AQI 500 at Ashok Vihar (DPCC) on 2024-11-18; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Delhi spans 39 CPCB stations with a 84-point spread (min 178, max 262); Siwan spans 1 stations with a 0-point spread (min 197, max 197).