Siliguri vs Virudhunagar
Side-by-side air quality comparison between Siliguri and Virudhunagar.
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 | Virudhunagar |
|---|---|---|
| PM2.5(µg/m³) | 69.80 | 4.50 |
| PM10(µg/m³) | 90.30 | 5.20 |
| NO₂(µg/m³) | 7.40 | 4.80 |
| SO₂(µg/m³) | 7.00 | 2.80 |
| O₃(µg/m³) | 138.00 | 44.00 |
| CO(µg/m³) | 486.00 | 144.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Siliguri averaged an AQI of 81 while Virudhunagar averaged 52 — a 29-point (56%) gap, with Siliguri the more polluted and Virudhunagar the cleaner of the two. On 189 days when both cities reported, Virudhunagar was cleaner on 157 of them; the average daily gap was 42 AQI points.
Seasonality & days
Siliguri peaks in February, while Virudhunagar peaks in November. Siliguri logged 0.1% Severe days and 61.8% Good-or-Satisfactory days; Virudhunagar was 0% Severe and 92.3% Good-or-Satisfactory. Longest clean-air streaks: Siliguri 180 days, Virudhunagar 31 days.
Year-over-year progress
The worst recorded day for Siliguri reached AQI 415 at Ward-32 Bapupara (WBPCB) on 2018-02-08; Virudhunagar hit AQI 173 at Collectorate Office (TNPCB) on 2024-11-07.
Station-level disparity
Siliguri spans 1 CPCB stations with a 0-point spread (min 107, max 107); Virudhunagar spans 1 stations with a 0-point spread (min 52, max 52).
Verdict
🏆 Virudhunagar has better air quality with an AQI of 8 compared to Siliguri's 133. That's a significant difference of 125 points.