Arrah vs Chapra
Side-by-side air quality comparison between Arrah and Chapra.
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 | Chapra |
|---|---|---|
| PM2.5(µg/m³) | 99.00 | 99.00 |
| PM10(µg/m³) | 115.50 | 115.50 |
| NO₂(µg/m³) | 53.70 | 53.70 |
| SO₂(µg/m³) | 13.70 | 13.70 |
| O₃(µg/m³) | 10.00 | 10.00 |
| CO(µg/m³) | 944.00 | 858.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Arrah averaged an AQI of 123 while Chapra averaged 149 — a 26-point (21%) gap, with Chapra the more polluted and Arrah the cleaner of the two. On 750 days when both cities reported, Arrah was cleaner on 553 of them; the average daily gap was 53 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Arrah logged 0.2% Severe days and 32.3% Good-or-Satisfactory days; Chapra was 2.4% Severe and 26.8% Good-or-Satisfactory. Longest clean-air streaks: Arrah 11 days, Chapra 14 days.
Year-over-year progress
Arrah has improved by 175 AQI points (58.7%) from 2021 to 2024; Chapra has improved by 181 AQI points (54.8%) over the same window. The worst recorded day for Arrah reached AQI 420 at New DM Office (BSPCB) on 2021-12-21; Chapra hit AQI 452 at Darshan Nagar (BSPCB) on 2022-12-20.
Station-level disparity
Arrah spans 1 CPCB stations with a 0-point spread (min 162, max 162); Chapra spans 1 stations with a 0-point spread (min 195, max 195).
Verdict
Both Arrah and Chapra have the same AQI of 231 right now.