Ariyalur vs Vellore
Side-by-side air quality comparison between Ariyalur 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 | Ariyalur | Vellore |
|---|---|---|
| PM2.5(µg/m³) | 7.50 | 8.00 |
| PM10(µg/m³) | 9.90 | 10.00 |
| NO₂(µg/m³) | 8.40 | 11.40 |
| SO₂(µg/m³) | 5.00 | 4.50 |
| O₃(µg/m³) | 42.00 | 41.00 |
| CO(µg/m³) | 137.00 | 175.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ariyalur averaged an AQI of 46 while Vellore averaged 61 — a 15-point (33%) gap, with Vellore the more polluted and Ariyalur the cleaner of the two. On 221 days when both cities reported, Ariyalur was cleaner on 166 of them; the average daily gap was 30 AQI points.
Seasonality & days
Ariyalur peaks in March, while Vellore peaks in December. Ariyalur logged 0% Severe days and 93.8% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Ariyalur 57 days, Vellore 23 days.
Year-over-year progress
Ariyalur has improved by 35 AQI points (43.2%) from 2022 to 2024; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Ariyalur reached AQI 221 at Keelapalur (TNPCB) on 2024-04-07; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Ariyalur spans 1 CPCB stations with a 0-point spread (min 51, max 51); Vellore spans 1 stations with a 0-point spread (min 70, max 70).
Verdict
Both Ariyalur and Vellore have the same AQI of 13 right now.