Shillong vs Silchar
Side-by-side air quality comparison between Shillong and Silchar.
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 | Silchar |
|---|---|---|
| PM2.5(µg/m³) | 20.40 | 53.70 |
| PM10(µg/m³) | 23.70 | 64.50 |
| NO₂(µg/m³) | 4.20 | 14.10 |
| SO₂(µg/m³) | 5.70 | 7.40 |
| O₃(µg/m³) | 99.00 | 94.00 |
| CO(µg/m³) | 305.00 | 289.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Shillong averaged an AQI of 75 while Silchar averaged 52 — a 23-point (44%) gap, with Shillong the more polluted and Silchar the cleaner of the two. On 185 days when both cities reported, Silchar was cleaner on 113 of them; the average daily gap was 39 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; Silchar was 0% Severe and 100% Good-or-Satisfactory. Longest clean-air streaks: Shillong 113 days, Silchar 87 days.
Year-over-year progress
Shillong has worsened by 41 AQI points (120.6%) from 2019 to 2024; Silchar has worsened by 11 AQI points (26.8%) over the same window. The worst recorded day for Shillong reached AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19; Silchar hit AQI 89 at Tarapur (PCBA) on 2023-04-29.
Station-level disparity
Shillong spans 2 CPCB stations with a 2-point spread (min 42, max 44); Silchar spans 1 stations with a 0-point spread (min 47, max 47).
Verdict
🏆 Shillong has better air quality with an AQI of 34 compared to Silchar's 90. That's a significant difference of 56 points.