Saharsa vs Silchar
Side-by-side air quality comparison between Saharsa 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 | Saharsa | Silchar |
|---|---|---|
| PM2.5(µg/m³) | 100.60 | 53.70 |
| PM10(µg/m³) | 109.00 | 64.50 |
| NO₂(µg/m³) | 40.40 | 14.10 |
| SO₂(µg/m³) | 12.20 | 7.40 |
| O₃(µg/m³) | 21.00 | 94.00 |
| CO(µg/m³) | 719.00 | 289.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Saharsa averaged an AQI of 139 while Silchar averaged 52 — a 87-point (167%) gap, with Saharsa the more polluted and Silchar the cleaner of the two. On 599 days when both cities reported, Silchar was cleaner on 554 of them; the average daily gap was 121 AQI points.
Seasonality & days
Saharsa peaks in January, while Silchar peaks in February. Saharsa logged 1.4% Severe days and 28.4% Good-or-Satisfactory days; Silchar was 0% Severe and 100% Good-or-Satisfactory. Longest clean-air streaks: Saharsa 20 days, Silchar 87 days.
Year-over-year progress
Saharsa has improved by 139 AQI points (50%) from 2021 to 2024; Silchar has worsened by 11 AQI points (26.8%) over the same window. The worst recorded day for Saharsa reached AQI 454 at Police Line (BSPCB) on 2022-12-13; Silchar hit AQI 89 at Tarapur (PCBA) on 2023-04-29.
Station-level disparity
Saharsa spans 1 CPCB stations with a 0-point spread (min 188, max 188); Silchar spans 1 stations with a 0-point spread (min 47, max 47).
Verdict
🏆 Silchar has better air quality with an AQI of 90 compared to Saharsa's 236. That's a significant difference of 146 points.