Kalyān vs Kollam
Side-by-side air quality comparison between Kalyān 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 | Kalyān | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 22.10 | 4.60 |
| PM10(µg/m³) | 40.40 | 7.10 |
| NO₂(µg/m³) | 23.10 | 4.40 |
| SO₂(µg/m³) | 21.70 | 1.50 |
| O₃(µg/m³) | 19.00 | 30.00 |
| CO(µg/m³) | 174.00 | 89.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kalyān averaged an AQI of 95 while Kollam averaged 84 — a 11-point (13%) gap, with Kalyān the more polluted and Kollam the cleaner of the two. On 951 days when both cities reported, Kollam was cleaner on 651 of them; the average daily gap was 58 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Kalyān logged 0.1% Severe days and 46.4% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Kalyān 78 days, Kollam 65 days.
Year-over-year progress
Kalyān has improved by 4 AQI points (4%) from 2019 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Kalyān reached AQI 414 at Khadakpada (MPCB) on 2022-01-24; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Kalyān spans 2 CPCB stations with a 18-point spread (min 98, max 116); Kollam spans 1 stations with a 0-point spread (min 84, max 84).
Verdict
🏆 Kollam has better air quality with an AQI of 8 compared to Kalyān's 40.