Siliguri vs Ulhasnagar
Side-by-side air quality comparison between Siliguri and Ulhasnagar.
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 | Ulhasnagar |
|---|---|---|
| PM2.5(µg/m³) | 77.80 | 23.70 |
| PM10(µg/m³) | 98.30 | 40.90 |
| NO₂(µg/m³) | 11.30 | 20.60 |
| SO₂(µg/m³) | 6.80 | 23.00 |
| O₃(µg/m³) | 115.00 | 23.00 |
| CO(µg/m³) | 523.00 | 215.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Siliguri averaged an AQI of 81 while Ulhasnagar averaged 117 — a 36-point (44%) gap, with Ulhasnagar the more polluted and Siliguri the cleaner of the two. On 346 days when both cities reported, Siliguri was cleaner on 290 of them; the average daily gap was 46 AQI points.
Seasonality & days
Siliguri peaks in February, while Ulhasnagar peaks in January. Siliguri logged 0.1% Severe days and 61.8% Good-or-Satisfactory days; Ulhasnagar was 0% Severe and 46.9% Good-or-Satisfactory. Longest clean-air streaks: Siliguri 180 days, Ulhasnagar 74 days.
Year-over-year progress
Siliguri has improved by 39 AQI points (32.5%) from 2018 to 2024; Ulhasnagar has improved by 10 AQI points (7.9%) over the same window. The worst recorded day for Siliguri reached AQI 415 at Ward-32 Bapupara (WBPCB) on 2018-02-08; Ulhasnagar hit AQI 319 at Sidhi Vinayak Nagar (MPCB) on 2023-11-13.
Station-level disparity
Siliguri spans 1 CPCB stations with a 0-point spread (min 107, max 107); Ulhasnagar spans 1 stations with a 0-point spread (min 120, max 120).
Verdict
🏆 Ulhasnagar has better air quality with an AQI of 41 compared to Siliguri's 160. That's a significant difference of 119 points.