Kalyān vs Shillong
Side-by-side air quality comparison between Kalyān 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 | Kalyān | Shillong |
|---|---|---|
| PM2.5(µg/m³) | 19.80 | 24.10 |
| PM10(µg/m³) | 44.40 | 29.20 |
| NO₂(µg/m³) | 9.70 | 2.00 |
| SO₂(µg/m³) | 22.70 | 5.20 |
| O₃(µg/m³) | 58.00 | 139.00 |
| CO(µg/m³) | 163.00 | 287.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kalyān averaged an AQI of 95 while Shillong averaged 75 — a 20-point (27%) gap, with Kalyān the more polluted and Shillong the cleaner of the two. On 849 days when both cities reported, Shillong was cleaner on 796 of them; the average daily gap was 77 AQI points.
Seasonality & days
Kalyān peaks in January, while Shillong peaks in February. Kalyān logged 0.1% Severe days and 46.4% Good-or-Satisfactory days; Shillong was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Kalyān 78 days, Shillong 113 days.
Year-over-year progress
Kalyān has improved by 4 AQI points (4%) from 2019 to 2024; Shillong has worsened by 41 AQI points (120.6%) over the same window. The worst recorded day for Kalyān reached AQI 414 at Khadakpada (MPCB) on 2022-01-24; Shillong hit AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19.
Station-level disparity
Kalyān spans 2 CPCB stations with a 18-point spread (min 98, max 116); Shillong spans 2 stations with a 2-point spread (min 42, max 44).
Verdict
🏆 Shillong has better air quality with an AQI of 40 compared to Kalyān's 44.