Arrah vs Gangtok
Side-by-side air quality comparison between Arrah and Gangtok.
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 | Gangtok |
|---|---|---|
| PM2.5(µg/m³) | 46.70 | 25.80 |
| PM10(µg/m³) | 73.10 | 32.80 |
| NO₂(µg/m³) | 0.40 | 1.50 |
| SO₂(µg/m³) | 6.60 | 2.70 |
| O₃(µg/m³) | 183.00 | 145.00 |
| CO(µg/m³) | 300.00 | 273.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Arrah averaged an AQI of 123 while Gangtok averaged 48 — a 75-point (156%) gap, with Arrah the more polluted and Gangtok the cleaner of the two. On 609 days when both cities reported, Gangtok was cleaner on 584 of them; the average daily gap was 112 AQI points.
Seasonality & days
Arrah peaks in January, while Gangtok peaks in March. Arrah logged 0.2% Severe days and 32.3% Good-or-Satisfactory days; Gangtok was 0% Severe and 96.2% Good-or-Satisfactory. Longest clean-air streaks: Arrah 11 days, Gangtok 94 days.
Year-over-year progress
Arrah has improved by 175 AQI points (58.7%) from 2021 to 2024; Gangtok has worsened by 14 AQI points (41.2%) over the same window. The worst recorded day for Arrah reached AQI 420 at New DM Office (BSPCB) on 2021-12-21; Gangtok hit AQI 264 at Zero Point GICI (SSPCB) on 2023-01-16.
Station-level disparity
Arrah spans 1 CPCB stations with a 0-point spread (min 162, max 162); Gangtok spans 1 stations with a 0-point spread (min 50, max 50).
Verdict
🏆 Gangtok has better air quality with an AQI of 43 compared to Arrah's 78.