Arrah vs Silchar
Side-by-side air quality comparison between Arrah 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 | Arrah | Silchar |
|---|---|---|
| PM2.5(µg/m³) | 99.00 | 53.00 |
| PM10(µg/m³) | 115.50 | 63.80 |
| NO₂(µg/m³) | 53.70 | 13.90 |
| SO₂(µg/m³) | 13.70 | 7.50 |
| O₃(µg/m³) | 10.00 | 95.00 |
| CO(µg/m³) | 944.00 | 276.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Arrah averaged an AQI of 123 while Silchar averaged 52 — a 71-point (137%) gap, with Arrah the more polluted and Silchar the cleaner of the two. On 518 days when both cities reported, Silchar was cleaner on 489 of them; the average daily gap was 108 AQI points.
Seasonality & days
Arrah peaks in January, while Silchar peaks in February. Arrah logged 0.2% Severe days and 32.3% Good-or-Satisfactory days; Silchar was 0% Severe and 100% Good-or-Satisfactory. Longest clean-air streaks: Arrah 11 days, Silchar 87 days.
Year-over-year progress
Arrah has improved by 175 AQI points (58.7%) from 2021 to 2024; Silchar has worsened by 11 AQI points (26.8%) over the same window. The worst recorded day for Arrah reached AQI 420 at New DM Office (BSPCB) on 2021-12-21; Silchar hit AQI 89 at Tarapur (PCBA) on 2023-04-29.
Station-level disparity
Arrah spans 1 CPCB stations with a 0-point spread (min 162, max 162); Silchar spans 1 stations with a 0-point spread (min 47, max 47).
Verdict
🏆 Silchar has better air quality with an AQI of 89 compared to Arrah's 231. That's a significant difference of 142 points.