Arrah vs Kalyān
Side-by-side air quality comparison between Arrah and Kalyān.
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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Arrah averaged an AQI of 123 while Kalyān averaged 95 — a 28-point (29%) gap, with Arrah the more polluted and Kalyān the cleaner of the two. On 506 days when both cities reported, Kalyān was cleaner on 281 of them; the average daily gap was 61 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; Kalyān was 0.1% Severe and 46.4% Good-or-Satisfactory. Longest clean-air streaks: Arrah 11 days, Kalyān 78 days.
Year-over-year progress
Arrah has improved by 175 AQI points (58.7%) from 2021 to 2024; Kalyān has improved by 4 AQI points (4%) over the same window. The worst recorded day for Arrah reached AQI 420 at New DM Office (BSPCB) on 2021-12-21; Kalyān hit AQI 414 at Khadakpada (MPCB) on 2022-01-24.
Station-level disparity
Arrah spans 1 CPCB stations with a 0-point spread (min 162, max 162); Kalyān spans 2 stations with a 18-point spread (min 98, max 116).