Hosur vs Kollam
Side-by-side air quality comparison between Hosur and Kollam.
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 | Hosur | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 5.00 | 4.60 |
| PM10(µg/m³) | 6.00 | 7.10 |
| NO₂(µg/m³) | 9.20 | 4.40 |
| SO₂(µg/m³) | 4.50 | 1.50 |
| O₃(µg/m³) | 37.00 | 30.00 |
| CO(µg/m³) | 147.00 | 89.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2022, Hosur averaged an AQI of 90 while Kollam averaged 84 — a 6-point (7%) gap, with Hosur the more polluted and Kollam the cleaner of the two. On 86 days when both cities reported, Kollam was cleaner on 55 of them; the average daily gap was 26 AQI points.
Seasonality & days
Hosur peaks in December, while Kollam peaks in January. Hosur logged 0% Severe days and 73.89999999999999% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Hosur 10 days, Kollam 65 days.
Year-over-year progress
The worst recorded day for Hosur reached AQI 232 at SIPCOT Phase-1 (TNPCB) on 2022-10-25; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Hosur spans 1 CPCB stations with a 0-point spread (min 90, max 90); Kollam spans 1 stations with a 0-point spread (min 84, max 84).
Verdict
Both Hosur and Kollam have the same AQI of 8 right now.