Chapra vs Samastipur
Side-by-side air quality comparison between Chapra 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 | Chapra | Samastipur |
|---|---|---|
| PM2.5(µg/m³) | 102.90 | 118.70 |
| PM10(µg/m³) | 117.10 | 131.30 |
| NO₂(µg/m³) | 42.70 | 48.30 |
| SO₂(µg/m³) | 15.30 | 20.10 |
| O₃(µg/m³) | 46.00 | 57.00 |
| CO(µg/m³) | 805.00 | 732.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chapra averaged an AQI of 149 while Samastipur averaged 134 — a 15-point (11%) gap, with Chapra the more polluted and Samastipur the cleaner of the two. On 688 days when both cities reported, Samastipur was cleaner on 363 of them; the average daily gap was 50 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Chapra logged 2.4% Severe days and 26.8% Good-or-Satisfactory days; Samastipur was 1.4% Severe and 23.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Chapra 14 days, Samastipur 9 days.
Year-over-year progress
Chapra has improved by 181 AQI points (54.8%) from 2021 to 2024; Samastipur has improved by 84 AQI points (38.5%) over the same window. The worst recorded day for Chapra reached AQI 452 at Darshan Nagar (BSPCB) on 2022-12-20; Samastipur hit AQI 459 at DM Office Kasipur (BSPCB) on 2023-01-01.
Station-level disparity
Chapra spans 1 CPCB stations with a 0-point spread (min 195, max 195); Samastipur spans 1 stations with a 0-point spread (min 177, max 177).
Verdict
🏆 Chapra has better air quality with an AQI of 244 compared to Samastipur's 296. That's a significant difference of 52 points.