Ludhiana vs Vellore
Side-by-side air quality comparison between Ludhiana 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 | Ludhiana | Vellore |
|---|---|---|
| PM2.5(µg/m³) | 71.50 | 7.00 |
| PM10(µg/m³) | 100.40 | 8.40 |
| NO₂(µg/m³) | 31.30 | 8.50 |
| SO₂(µg/m³) | 17.00 | 4.30 |
| O₃(µg/m³) | 62.00 | 44.00 |
| CO(µg/m³) | 748.00 | 141.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2021, Ludhiana averaged an AQI of 117 while Vellore averaged 61 — a 56-point (92%) gap, with Ludhiana the more polluted and Vellore the cleaner of the two.
Seasonality & days
Ludhiana peaks in November, while Vellore peaks in December. Ludhiana logged 0.3% Severe days and 53.599999999999994% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Ludhiana 53 days, Vellore 23 days.
Year-over-year progress
Ludhiana has improved by 79 AQI points (40.3%) from 2017 to 2021; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Ludhiana reached AQI 488 at Punjab Agricultural University (PPCB) on 2018-06-14; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Ludhiana spans 1 CPCB stations with a 0-point spread (min 118, max 118); Vellore spans 1 stations with a 0-point spread (min 70, max 70).
Verdict
🏆 Vellore has better air quality with an AQI of 12 compared to Ludhiana's 139. That's a significant difference of 127 points.