Asansol vs Shillong
Side-by-side air quality comparison between Asansol and Shillong.
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 | Asansol | Shillong |
|---|---|---|
| PM2.5(µg/m³) | 89.60 | 20.40 |
| PM10(µg/m³) | 95.50 | 23.70 |
| NO₂(µg/m³) | 48.70 | 4.20 |
| SO₂(µg/m³) | 82.10 | 5.70 |
| O₃(µg/m³) | 39.00 | 99.00 |
| CO(µg/m³) | 708.00 | 305.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Asansol averaged an AQI of 145 while Shillong averaged 75 — a 70-point (93%) gap, with Asansol the more polluted and Shillong the cleaner of the two. On 927 days when both cities reported, Shillong was cleaner on 889 of them; the average daily gap was 95 AQI points.
Seasonality & days
Asansol peaks in December, while Shillong peaks in February. Asansol logged 0% Severe days and 43.3% Good-or-Satisfactory days; Shillong was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Asansol 44 days, Shillong 113 days.
Year-over-year progress
Asansol has worsened by 12 AQI points (9%) from 2018 to 2024; Shillong has worsened by 41 AQI points (120.6%) over the same window. The worst recorded day for Asansol reached AQI 394 at Court Area (WBPCB) on 2022-12-13; Shillong hit AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19.
Station-level disparity
Asansol spans 4 CPCB stations with a 40-point spread (min 123, max 163); Shillong spans 2 stations with a 2-point spread (min 42, max 44).
Verdict
🏆 Shillong has better air quality with an AQI of 34 compared to Asansol's 199. That's a significant difference of 165 points.