Haldia vs Samastipur
Side-by-side air quality comparison between Haldia and Samastipur.
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 | Samastipur |
|---|---|---|
| PM2.5(µg/m³) | 49.00 | 124.30 |
| PM10(µg/m³) | 53.80 | 140.20 |
| NO₂(µg/m³) | 14.40 | 60.30 |
| SO₂(µg/m³) | 8.90 | 19.10 |
| O₃(µg/m³) | 77.00 | 14.00 |
| CO(µg/m³) | 273.00 | 804.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Haldia averaged an AQI of 90 while Samastipur averaged 134 — a 44-point (49%) gap, with Samastipur the more polluted and Haldia the cleaner of the two. On 560 days when both cities reported, Haldia was cleaner on 476 of them; the average daily gap was 89 AQI points.
Seasonality & days
Haldia peaks in December, while Samastipur peaks in January. Haldia logged 0% Severe days and 65.4% Good-or-Satisfactory days; Samastipur was 1.4% Severe and 23.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Haldia 51 days, Samastipur 9 days.
Year-over-year progress
Haldia has worsened by 8 AQI points (9.8%) from 2023 to 2024; Samastipur has improved by 84 AQI points (38.5%) over the same window. The worst recorded day for Haldia reached AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26; Samastipur hit AQI 459 at DM Office Kasipur (BSPCB) on 2023-01-01.
Station-level disparity
Haldia spans 1 CPCB stations with a 0-point spread (min 86, max 86); Samastipur spans 1 stations with a 0-point spread (min 177, max 177).
Verdict
🏆 Haldia has better air quality with an AQI of 82 compared to Samastipur's 304. That's a significant difference of 222 points.