Haldia vs Vellore
Side-by-side air quality comparison between Haldia 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 | Haldia | Vellore |
|---|---|---|
| PM2.5(µg/m³) | 46.60 | 7.00 |
| PM10(µg/m³) | 51.90 | 8.40 |
| NO₂(µg/m³) | 11.40 | 8.50 |
| SO₂(µg/m³) | 10.40 | 4.30 |
| O₃(µg/m³) | 96.00 | 44.00 |
| CO(µg/m³) | 284.00 | 141.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Haldia averaged an AQI of 90 while Vellore averaged 61 — a 29-point (48%) gap, with Haldia the more polluted and Vellore the cleaner of the two. On 244 days when both cities reported, Vellore was cleaner on 159 of them; the average daily gap was 44 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Haldia logged 0% Severe days and 65.4% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Haldia 51 days, Vellore 23 days.
Year-over-year progress
Haldia has worsened by 8 AQI points (9.8%) from 2023 to 2024; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Haldia reached AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Haldia spans 1 CPCB stations with a 0-point spread (min 86, max 86); 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 Haldia's 78. That's a significant difference of 66 points.