Siliguri vs Vellore
Side-by-side air quality comparison between Siliguri 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
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Siliguri | Vellore |
|---|---|---|
| PM2.5(µg/m³) | 77.80 | 7.00 |
| PM10(µg/m³) | 98.30 | 8.40 |
| NO₂(µg/m³) | 11.30 | 8.50 |
| SO₂(µg/m³) | 6.80 | 4.30 |
| O₃(µg/m³) | 115.00 | 44.00 |
| CO(µg/m³) | 523.00 | 141.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Siliguri averaged an AQI of 81 while Vellore averaged 61 — a 20-point (33%) gap, with Siliguri the more polluted and Vellore the cleaner of the two. On 228 days when both cities reported, Vellore was cleaner on 153 of them; the average daily gap was 35 AQI points.
Seasonality & days
Siliguri peaks in February, while Vellore peaks in December. Siliguri logged 0.1% Severe days and 61.8% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Siliguri 180 days, Vellore 23 days.
Year-over-year progress
Siliguri has improved by 39 AQI points (32.5%) from 2018 to 2024; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Siliguri reached AQI 415 at Ward-32 Bapupara (WBPCB) on 2018-02-08; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Siliguri spans 1 CPCB stations with a 0-point spread (min 107, max 107); Vellore spans 1 stations with a 0-point spread (min 70, max 70).
Verdict
🏆 Vellore has better air quality with an AQI of 12 compared to Siliguri's 160. That's a significant difference of 148 points.