Delhi vs Vellore
Side-by-side air quality comparison between Delhi and Vellore.
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 Vellore averaged 61 — a 149-point (244%) gap, with Delhi the more polluted and Vellore the cleaner of the two. On 303 days when both cities reported, Vellore was cleaner on 303 of them; the average daily gap was 255 AQI points.
Seasonality & days
Delhi peaks in November, while Vellore peaks in December. Delhi logged 18.7% Severe days and 1.7% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Delhi 3 days, Vellore 23 days.
Year-over-year progress
Delhi has improved by 42 AQI points (16.7%) from 2016 to 2024; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Delhi reached AQI 500 at Ashok Vihar (DPCC) on 2024-11-18; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Delhi spans 39 CPCB stations with a 84-point spread (min 178, max 262); Vellore spans 1 stations with a 0-point spread (min 70, max 70).