Ludhiana vs Siliguri
Side-by-side air quality comparison between Ludhiana and Siliguri.
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 | Ludhiana | Siliguri |
|---|---|---|
| PM2.5(µg/m³) | 81.70 | 82.20 |
| PM10(µg/m³) | 109.20 | 105.70 |
| NO₂(µg/m³) | 40.40 | 15.40 |
| SO₂(µg/m³) | 15.20 | 6.50 |
| O₃(µg/m³) | 35.00 | 95.00 |
| CO(µg/m³) | 797.00 | 539.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2021, Ludhiana averaged an AQI of 117 while Siliguri averaged 81 — a 36-point (44%) gap, with Ludhiana the more polluted and Siliguri the cleaner of the two. On 1181 days when both cities reported, Siliguri was cleaner on 708 of them; the average daily gap was 76 AQI points.
Seasonality & days
Ludhiana peaks in November, while Siliguri peaks in February. Ludhiana logged 0.3% Severe days and 53.599999999999994% Good-or-Satisfactory days; Siliguri was 0.1% Severe and 61.8% Good-or-Satisfactory. Longest clean-air streaks: Ludhiana 53 days, Siliguri 180 days.
Year-over-year progress
Ludhiana has improved by 79 AQI points (40.3%) from 2017 to 2021; Siliguri has improved by 39 AQI points (32.5%) over the same window. The worst recorded day for Ludhiana reached AQI 488 at Punjab Agricultural University (PPCB) on 2018-06-14; Siliguri hit AQI 415 at Ward-32 Bapupara (WBPCB) on 2018-02-08.
Station-level disparity
Ludhiana spans 1 CPCB stations with a 0-point spread (min 118, max 118); Siliguri spans 1 stations with a 0-point spread (min 107, max 107).
Verdict
🏆 Ludhiana has better air quality with an AQI of 173 compared to Siliguri's 174.