Arrah vs Guwahati
Side-by-side air quality comparison between Arrah and Guwahati.
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 | Guwahati |
|---|---|---|
| PM2.5(µg/m³) | 102.90 | 31.90 |
| PM10(µg/m³) | 117.10 | 36.00 |
| NO₂(µg/m³) | 42.70 | 5.40 |
| SO₂(µg/m³) | 15.30 | 4.20 |
| O₃(µg/m³) | 46.00 | 97.00 |
| CO(µg/m³) | 841.00 | 393.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Arrah averaged an AQI of 123 while Guwahati averaged 123 — a 0-point (0%) gap, with Guwahati the more polluted and Arrah the cleaner of the two. On 864 days when both cities reported, Guwahati was cleaner on 485 of them; the average daily gap was 70 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Arrah logged 0.2% Severe days and 32.3% Good-or-Satisfactory days; Guwahati was 0.1% Severe and 44.9% Good-or-Satisfactory. Longest clean-air streaks: Arrah 11 days, Guwahati 105 days.
Year-over-year progress
Arrah has improved by 175 AQI points (58.7%) from 2021 to 2024; Guwahati has worsened by 14 AQI points (12.8%) over the same window. The worst recorded day for Arrah reached AQI 420 at New DM Office (BSPCB) on 2021-12-21; Guwahati hit AQI 420 at Railway Colony (PCBA) on 2023-01-15.
Station-level disparity
Arrah spans 1 CPCB stations with a 0-point spread (min 162, max 162); Guwahati spans 4 stations with a 26-point spread (min 118, max 144).
Verdict
🏆 Guwahati has better air quality with an AQI of 54 compared to Arrah's 244. That's a significant difference of 190 points.