Coimbatore vs Silchar
Side-by-side air quality comparison between Coimbatore 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 | Coimbatore | Silchar |
|---|---|---|
| PM2.5(µg/m³) | 2.50 | 53.00 |
| PM10(µg/m³) | 3.00 | 63.80 |
| NO₂(µg/m³) | 4.60 | 13.90 |
| SO₂(µg/m³) | 2.00 | 7.50 |
| O₃(µg/m³) | 40.00 | 95.00 |
| CO(µg/m³) | 163.00 | 276.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Silchar averaged 52 — a 14-point (27%) gap, with Coimbatore the more polluted and Silchar the cleaner of the two. On 281 days when both cities reported, Silchar was cleaner on 163 of them; the average daily gap was 27 AQI points.
Seasonality & days
Coimbatore peaks in November, while Silchar peaks in February. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Silchar was 0% Severe and 100% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Silchar 87 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Silchar has worsened by 11 AQI points (26.8%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Silchar hit AQI 89 at Tarapur (PCBA) on 2023-04-29.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Silchar spans 1 stations with a 0-point spread (min 47, max 47).
Verdict
🏆 Coimbatore has better air quality with an AQI of 4 compared to Silchar's 89. That's a significant difference of 85 points.