Ujjain vs Vellore
Side-by-side air quality comparison between Ujjain 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 | Ujjain | Vellore |
|---|---|---|
| PM2.5(µg/m³) | 32.40 | 8.00 |
| PM10(µg/m³) | 47.70 | 10.00 |
| NO₂(µg/m³) | 6.80 | 11.40 |
| SO₂(µg/m³) | 13.70 | 4.50 |
| O₃(µg/m³) | 66.00 | 41.00 |
| CO(µg/m³) | 215.00 | 175.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ujjain averaged an AQI of 116 while Vellore averaged 61 — a 55-point (90%) gap, with Ujjain the more polluted and Vellore the cleaner of the two. On 275 days when both cities reported, Vellore was cleaner on 256 of them; the average daily gap was 66 AQI points.
Seasonality & days
Ujjain peaks in November, while Vellore peaks in December. Ujjain logged 0.1% Severe days and 33.800000000000004% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Ujjain 67 days, Vellore 23 days.
Year-over-year progress
Ujjain has improved by 71 AQI points (38%) from 2017 to 2024; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Ujjain reached AQI 500 at Mahakaleshwar Temple (MPPCB) on 2023-03-10; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Ujjain spans 1 CPCB stations with a 0-point spread (min 131, max 131); Vellore spans 1 stations with a 0-point spread (min 70, max 70).
Verdict
🏆 Vellore has better air quality with an AQI of 13 compared to Ujjain's 55.