Kalyān vs Vellore
Side-by-side air quality comparison between Kalyān and Vellore.
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 | Vellore |
|---|---|---|
| PM2.5(µg/m³) | 24.30 | 5.50 |
| PM10(µg/m³) | 50.80 | 8.80 |
| NO₂(µg/m³) | 5.00 | 1.10 |
| SO₂(µg/m³) | 16.90 | 2.00 |
| O₃(µg/m³) | 106.00 | 96.00 |
| CO(µg/m³) | 150.00 | 158.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kalyān averaged an AQI of 95 while Vellore averaged 61 — a 34-point (56%) gap, with Kalyān the more polluted and Vellore the cleaner of the two. On 229 days when both cities reported, Vellore was cleaner on 201 of them; the average daily gap was 48 AQI points.
Seasonality & days
Kalyān peaks in January, while Vellore peaks in December. Kalyān logged 0.1% Severe days and 46.4% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Kalyān 78 days, Vellore 23 days.
Year-over-year progress
Kalyān has improved by 4 AQI points (4%) from 2019 to 2024; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Kalyān reached AQI 414 at Khadakpada (MPCB) on 2022-01-24; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Kalyān spans 2 CPCB stations with a 18-point spread (min 98, max 116); Vellore spans 1 stations with a 0-point spread (min 70, max 70).
Verdict
🏆 Vellore has better air quality with an AQI of 9 compared to Kalyān's 52.