Salem vs Silchar
Side-by-side air quality comparison between Salem 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 | Salem | Silchar |
|---|---|---|
| PM2.5(µg/m³) | 12.70 | 53.00 |
| PM10(µg/m³) | 15.90 | 63.80 |
| NO₂(µg/m³) | 17.00 | 13.90 |
| SO₂(µg/m³) | 7.00 | 7.50 |
| O₃(µg/m³) | 30.00 | 95.00 |
| CO(µg/m³) | 237.00 | 276.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Salem averaged an AQI of 68 while Silchar averaged 52 — a 16-point (31%) gap, with Salem the more polluted and Silchar the cleaner of the two. On 315 days when both cities reported, Silchar was cleaner on 233 of them; the average daily gap was 32 AQI points.
Seasonality & days
Salem peaks in April, while Silchar peaks in February. Salem logged 0% Severe days and 87.1% Good-or-Satisfactory days; Silchar was 0% Severe and 100% Good-or-Satisfactory. Longest clean-air streaks: Salem 17 days, Silchar 87 days.
Year-over-year progress
Salem has improved by 5 AQI points (6.8%) from 2022 to 2024; Silchar has worsened by 11 AQI points (26.8%) over the same window. The worst recorded day for Salem reached AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15; Silchar hit AQI 89 at Tarapur (PCBA) on 2023-04-29.
Station-level disparity
Salem spans 1 CPCB stations with a 0-point spread (min 73, max 73); Silchar spans 1 stations with a 0-point spread (min 47, max 47).
Verdict
🏆 Salem has better air quality with an AQI of 21 compared to Silchar's 89. That's a significant difference of 68 points.