Ratlam vs Vellore
Side-by-side air quality comparison between Ratlam 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 | Ratlam | Vellore |
|---|---|---|
| PM2.5(µg/m³) | 25.00 | 7.00 |
| PM10(µg/m³) | 40.30 | 8.40 |
| NO₂(µg/m³) | 8.90 | 8.50 |
| SO₂(µg/m³) | 16.30 | 4.30 |
| O₃(µg/m³) | 44.00 | 44.00 |
| CO(µg/m³) | 194.00 | 141.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ratlam averaged an AQI of 113 while Vellore averaged 61 — a 52-point (85%) gap, with Ratlam the more polluted and Vellore the cleaner of the two. On 293 days when both cities reported, Vellore was cleaner on 241 of them; the average daily gap was 53 AQI points.
Seasonality & days
Ratlam peaks in November, while Vellore peaks in December. Ratlam logged 0% Severe days and 46.4% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Ratlam 59 days, Vellore 23 days.
Year-over-year progress
Ratlam has improved by 19 AQI points (14.4%) from 2018 to 2024; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Ratlam reached AQI 302 at Shasthri Nagar Ratlam (Lab) on 2020-11-11; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Ratlam spans 1 CPCB stations with a 0-point spread (min 103, max 103); 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 Ratlam's 42.