Arrah vs Hosur
Side-by-side air quality comparison between Arrah and Hosur.
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 | Hosur |
|---|---|---|
| PM2.5(µg/m³) | 49.50 | 3.50 |
| PM10(µg/m³) | 75.90 | 4.40 |
| NO₂(µg/m³) | 0.50 | 1.50 |
| SO₂(µg/m³) | 7.50 | 2.40 |
| O₃(µg/m³) | 190.00 | 88.00 |
| CO(µg/m³) | 317.00 | 128.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Arrah averaged an AQI of 123 while Hosur averaged 90 — a 33-point (37%) gap, with Arrah the more polluted and Hosur the cleaner of the two. On 84 days when both cities reported, Hosur was cleaner on 65 of them; the average daily gap was 99 AQI points.
Seasonality & days
Arrah peaks in January, while Hosur peaks in December. Arrah logged 0.2% Severe days and 32.3% Good-or-Satisfactory days; Hosur was 0% Severe and 73.89999999999999% Good-or-Satisfactory. Longest clean-air streaks: Arrah 11 days, Hosur 10 days.
Year-over-year progress
The worst recorded day for Arrah reached AQI 420 at New DM Office (BSPCB) on 2021-12-21; Hosur hit AQI 232 at SIPCOT Phase-1 (TNPCB) on 2022-10-25.
Station-level disparity
Arrah spans 1 CPCB stations with a 0-point spread (min 162, max 162); Hosur spans 1 stations with a 0-point spread (min 90, max 90).
Verdict
🏆 Hosur has better air quality with an AQI of 6 compared to Arrah's 83. That's a significant difference of 77 points.