Siliguri vs Tonk
Side-by-side air quality comparison between Siliguri and Tonk.
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 | Tonk |
|---|---|---|
| PM2.5(µg/m³) | 82.20 | 34.90 |
| PM10(µg/m³) | 105.70 | 75.90 |
| NO₂(µg/m³) | 15.40 | 14.10 |
| SO₂(µg/m³) | 6.50 | 4.50 |
| O₃(µg/m³) | 95.00 | 38.00 |
| CO(µg/m³) | 539.00 | 239.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Siliguri averaged an AQI of 81 while Tonk averaged 142 — a 61-point (75%) gap, with Tonk the more polluted and Siliguri the cleaner of the two. On 292 days when both cities reported, Siliguri was cleaner on 236 of them; the average daily gap was 64 AQI points.
Seasonality & days
Siliguri peaks in February, while Tonk peaks in November. Siliguri logged 0.1% Severe days and 61.8% Good-or-Satisfactory days; Tonk was 0% Severe and 28.200000000000003% Good-or-Satisfactory. Longest clean-air streaks: Siliguri 180 days, Tonk 11 days.
Year-over-year progress
Siliguri has improved by 39 AQI points (32.5%) from 2018 to 2024; Tonk has improved by 14 AQI points (9%) over the same window. The worst recorded day for Siliguri reached AQI 415 at Ward-32 Bapupara (WBPCB) on 2018-02-08; Tonk hit AQI 368 at Shastri Nagar (RSPCB) on 2023-11-17.
Station-level disparity
Siliguri spans 1 CPCB stations with a 0-point spread (min 107, max 107); Tonk spans 1 stations with a 0-point spread (min 148, max 148).
Verdict
🏆 Tonk has better air quality with an AQI of 76 compared to Siliguri's 174. That's a significant difference of 98 points.