Arrah vs Coimbatore
Side-by-side air quality comparison between Arrah and Coimbatore.
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 Coimbatore averaged 66 — a 57-point (86%) gap, with Arrah the more polluted and Coimbatore the cleaner of the two. On 430 days when both cities reported, Coimbatore was cleaner on 379 of them; the average daily gap was 86 AQI points.
Seasonality & days
Arrah peaks in January, while Coimbatore peaks in November. Arrah logged 0.2% Severe days and 32.3% Good-or-Satisfactory days; Coimbatore was 0% Severe and 90.5% Good-or-Satisfactory. Longest clean-air streaks: Arrah 11 days, Coimbatore 32 days.
Year-over-year progress
Arrah has improved by 175 AQI points (58.7%) from 2021 to 2024; Coimbatore has improved by 5 AQI points (7%) over the same window. The worst recorded day for Arrah reached AQI 420 at New DM Office (BSPCB) on 2021-12-21; Coimbatore hit AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28.
Station-level disparity
Arrah spans 1 CPCB stations with a 0-point spread (min 162, max 162); Coimbatore spans 2 stations with a 1-point spread (min 63, max 64).