Arrah vs Haldia
Side-by-side air quality comparison between Arrah and Haldia.
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 | Arrah | Haldia |
|---|---|---|
| PM2.5(µg/m³) | 102.90 | 46.60 |
| PM10(µg/m³) | 117.10 | 51.90 |
| NO₂(µg/m³) | 42.70 | 11.40 |
| SO₂(µg/m³) | 15.30 | 10.40 |
| O₃(µg/m³) | 46.00 | 96.00 |
| CO(µg/m³) | 841.00 | 284.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Arrah averaged an AQI of 123 while Haldia averaged 90 — a 33-point (37%) gap, with Arrah the more polluted and Haldia the cleaner of the two. On 523 days when both cities reported, Haldia was cleaner on 425 of them; the average daily gap was 86 AQI points.
Seasonality & days
Arrah peaks in January, while Haldia peaks in December. Arrah logged 0.2% Severe days and 32.3% Good-or-Satisfactory days; Haldia was 0% Severe and 65.4% Good-or-Satisfactory. Longest clean-air streaks: Arrah 11 days, Haldia 51 days.
Year-over-year progress
Arrah has improved by 175 AQI points (58.7%) from 2021 to 2024; Haldia has worsened by 8 AQI points (9.8%) over the same window. The worst recorded day for Arrah reached AQI 420 at New DM Office (BSPCB) on 2021-12-21; Haldia hit AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26.
Station-level disparity
Arrah spans 1 CPCB stations with a 0-point spread (min 162, max 162); Haldia spans 1 stations with a 0-point spread (min 86, max 86).
Verdict
🏆 Haldia has better air quality with an AQI of 78 compared to Arrah's 244. That's a significant difference of 166 points.