Patna vs Silchar
Side-by-side air quality comparison between Patna 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 | Patna | Silchar |
|---|---|---|
| PM2.5(µg/m³) | 97.80 | 35.20 |
| PM10(µg/m³) | 109.40 | 45.10 |
| NO₂(µg/m³) | 40.50 | 10.60 |
| SO₂(µg/m³) | 18.90 | 6.70 |
| O₃(µg/m³) | 52.00 | 100.00 |
| CO(µg/m³) | 667.00 | 270.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Patna averaged an AQI of 172 while Silchar averaged 52 — a 120-point (231%) gap, with Patna the more polluted and Silchar the cleaner of the two. On 692 days when both cities reported, Silchar was cleaner on 689 of them; the average daily gap was 200 AQI points.
Seasonality & days
Patna peaks in December, while Silchar peaks in February. Patna logged 7.5% Severe days and 19.400000000000002% Good-or-Satisfactory days; Silchar was 0% Severe and 100% Good-or-Satisfactory. Longest clean-air streaks: Patna 30 days, Silchar 87 days.
Year-over-year progress
Patna has improved by 40 AQI points (18.9%) from 2016 to 2024; Silchar has worsened by 11 AQI points (26.8%) over the same window. The worst recorded day for Patna reached AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01; Silchar hit AQI 89 at Tarapur (PCBA) on 2023-04-29.
Station-level disparity
Patna spans 6 CPCB stations with a 39-point spread (min 154, max 193); Silchar spans 1 stations with a 0-point spread (min 47, max 47).
Verdict
🏆 Silchar has better air quality with an AQI of 59 compared to Patna's 227. That's a significant difference of 168 points.