Shillong vs Siliguri
Side-by-side air quality comparison between Shillong 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 | Shillong | Siliguri |
|---|---|---|
| PM2.5(µg/m³) | 17.90 | 77.80 |
| PM10(µg/m³) | 21.40 | 98.30 |
| NO₂(µg/m³) | 3.10 | 11.30 |
| SO₂(µg/m³) | 6.20 | 6.80 |
| O₃(µg/m³) | 118.00 | 115.00 |
| CO(µg/m³) | 304.00 | 523.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Shillong averaged an AQI of 75 while Siliguri averaged 81 — a 6-point (8%) gap, with Siliguri the more polluted and Shillong the cleaner of the two. On 860 days when both cities reported, Shillong was cleaner on 761 of them; the average daily gap was 60 AQI points.
Seasonality & days
Both cities see their worst air in February on average. Shillong logged 0% Severe days and 92% Good-or-Satisfactory days; Siliguri was 0.1% Severe and 61.8% Good-or-Satisfactory. Longest clean-air streaks: Shillong 113 days, Siliguri 180 days.
Year-over-year progress
Shillong has worsened by 41 AQI points (120.6%) from 2019 to 2024; Siliguri has improved by 39 AQI points (32.5%) over the same window. The worst recorded day for Shillong reached AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19; Siliguri hit AQI 415 at Ward-32 Bapupara (WBPCB) on 2018-02-08.
Station-level disparity
Shillong spans 2 CPCB stations with a 2-point spread (min 42, max 44); Siliguri spans 1 stations with a 0-point spread (min 107, max 107).
Verdict
🏆 Shillong has better air quality with an AQI of 30 compared to Siliguri's 160. That's a significant difference of 130 points.