Mumbai vs Shillong
Side-by-side air quality comparison between Mumbai 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 | Mumbai | Shillong |
|---|---|---|
| PM2.5(µg/m³) | 17.50 | 17.90 |
| PM10(µg/m³) | 40.70 | 21.40 |
| NO₂(µg/m³) | 11.00 | 3.10 |
| SO₂(µg/m³) | 12.60 | 6.20 |
| O₃(µg/m³) | 42.00 | 118.00 |
| CO(µg/m³) | 196.00 | 304.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Mumbai averaged an AQI of 93 while Shillong averaged 75 — a 18-point (24%) gap, with Mumbai the more polluted and Shillong the cleaner of the two. On 997 days when both cities reported, Shillong was cleaner on 981 of them; the average daily gap was 138 AQI points.
Seasonality & days
Mumbai peaks in December, while Shillong peaks in February. Mumbai logged 0.5% Severe days and 34% Good-or-Satisfactory days; Shillong was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Mumbai 58 days, Shillong 113 days.
Year-over-year progress
Mumbai has improved by 4 AQI points (4.1%) from 2016 to 2024; Shillong has worsened by 41 AQI points (120.6%) over the same window. The worst recorded day for Mumbai reached AQI 500 at Vile Parle West (MPCB) on 2022-08-15; Shillong hit AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19.
Station-level disparity
Mumbai spans 29 CPCB stations with a 74-point spread (min 77, max 151); Shillong spans 2 stations with a 2-point spread (min 42, max 44).
Verdict
🏆 Shillong has better air quality with an AQI of 30 compared to Mumbai's 41.