Coimbatore vs Hosur
Side-by-side air quality comparison between Coimbatore 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 | Coimbatore | Hosur |
|---|---|---|
| PM2.5(µg/m³) | 2.10 | 3.50 |
| PM10(µg/m³) | 2.50 | 4.40 |
| NO₂(µg/m³) | 1.50 | 1.50 |
| SO₂(µg/m³) | 1.20 | 2.40 |
| O₃(µg/m³) | 68.00 | 88.00 |
| CO(µg/m³) | 135.00 | 128.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Hosur averaged 90 — a 24-point (36%) gap, with Hosur the more polluted and Coimbatore the cleaner of the two. On 59 days when both cities reported, Coimbatore was cleaner on 49 of them; the average daily gap was 37 AQI points.
Seasonality & days
Coimbatore peaks in November, while Hosur peaks in December. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Hosur was 0% Severe and 73.89999999999999% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Hosur 10 days.
Year-over-year progress
The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Hosur hit AQI 232 at SIPCOT Phase-1 (TNPCB) on 2022-10-25.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Hosur spans 1 stations with a 0-point spread (min 90, max 90).
Verdict
🏆 Coimbatore has better air quality with an AQI of 4 compared to Hosur's 6.