Charkhi Dādri vs Samastipur
Side-by-side air quality comparison between Charkhi Dādri 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 | Charkhi Dādri | Samastipur |
|---|---|---|
| PM2.5(µg/m³) | 47.10 | 65.70 |
| PM10(µg/m³) | 227.20 | 91.70 |
| NO₂(µg/m³) | 0.70 | 1.70 |
| SO₂(µg/m³) | 4.50 | 15.00 |
| O₃(µg/m³) | 145.00 | 229.00 |
| CO(µg/m³) | 238.00 | 306.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Charkhi Dādri averaged an AQI of 145 while Samastipur averaged 134 — a 11-point (8%) gap, with Charkhi Dādri the more polluted and Samastipur the cleaner of the two. On 765 days when both cities reported, Charkhi Dādri was cleaner on 455 of them; the average daily gap was 74 AQI points.
Seasonality & days
Charkhi Dādri peaks in November, while Samastipur peaks in January. Charkhi Dādri logged 0.7% Severe days and 28% Good-or-Satisfactory days; Samastipur was 1.4% Severe and 23.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Charkhi Dādri 48 days, Samastipur 9 days.
Year-over-year progress
Charkhi Dādri has improved by 51 AQI points (26%) from 2020 to 2024; Samastipur has improved by 84 AQI points (38.5%) over the same window. The worst recorded day for Charkhi Dādri reached AQI 470 at Mini Secretariat Charkhi (HSPCB) on 2021-11-12; Samastipur hit AQI 459 at DM Office Kasipur (BSPCB) on 2023-01-01.
Station-level disparity
Charkhi Dādri spans 1 CPCB stations with a 0-point spread (min 162, max 162); Samastipur spans 1 stations with a 0-point spread (min 177, max 177).
Verdict
🏆 Samastipur has better air quality with an AQI of 120 compared to Charkhi Dādri's 185. That's a significant difference of 65 points.