Howrah vs Vellore
Side-by-side air quality comparison between Howrah 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 | Howrah | Vellore |
|---|---|---|
| PM2.5(µg/m³) | 68.70 | 8.00 |
| PM10(µg/m³) | 72.60 | 10.00 |
| NO₂(µg/m³) | 22.20 | 11.40 |
| SO₂(µg/m³) | 11.50 | 4.50 |
| O₃(µg/m³) | 55.00 | 41.00 |
| CO(µg/m³) | 360.00 | 175.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Vellore averaged 61 — a 65-point (107%) gap, with Howrah the more polluted and Vellore the cleaner of the two. On 234 days when both cities reported, Vellore was cleaner on 217 of them; the average daily gap was 95 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Vellore 23 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); 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 Howrah's 130. That's a significant difference of 117 points.