Haldia vs Howrah
Side-by-side air quality comparison between Haldia and Howrah.
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 | Howrah |
|---|---|---|
| PM2.5(µg/m³) | 49.00 | 68.70 |
| PM10(µg/m³) | 53.80 | 72.60 |
| NO₂(µg/m³) | 14.40 | 22.20 |
| SO₂(µg/m³) | 8.90 | 11.50 |
| O₃(µg/m³) | 77.00 | 55.00 |
| CO(µg/m³) | 273.00 | 360.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Haldia averaged an AQI of 90 while Howrah averaged 126 — a 36-point (40%) gap, with Howrah the more polluted and Haldia the cleaner of the two. On 359 days when both cities reported, Haldia was cleaner on 354 of them; the average daily gap was 61 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; Howrah was 0.7% Severe and 48.7% Good-or-Satisfactory. Longest clean-air streaks: Haldia 51 days, Howrah 120 days.
Year-over-year progress
Haldia has worsened by 8 AQI points (9.8%) from 2023 to 2024; Howrah has improved by 32 AQI points (20.3%) over the same window. The worst recorded day for Haldia reached AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26; Howrah hit AQI 500 at Ghusuri (WBPCB) on 2017-04-15.
Station-level disparity
Haldia spans 1 CPCB stations with a 0-point spread (min 86, max 86); Howrah spans 5 stations with a 116-point spread (min 111, max 227).
Verdict
🏆 Haldia has better air quality with an AQI of 82 compared to Howrah's 130.