Chapra vs Patna
Side-by-side air quality comparison between Chapra and Patna.
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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chapra averaged an AQI of 149 while Patna averaged 172 — a 23-point (15%) gap, with Patna the more polluted and Chapra the cleaner of the two. On 966 days when both cities reported, Chapra was cleaner on 825 of them; the average daily gap was 66 AQI points.
Seasonality & days
Chapra peaks in January, while Patna peaks in December. Chapra logged 2.4% Severe days and 26.8% Good-or-Satisfactory days; Patna was 7.5% Severe and 19.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Chapra 14 days, Patna 30 days.
Year-over-year progress
Chapra has improved by 181 AQI points (54.8%) from 2021 to 2024; Patna has improved by 40 AQI points (18.9%) over the same window. The worst recorded day for Chapra reached AQI 452 at Darshan Nagar (BSPCB) on 2022-12-20; Patna hit AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01.
Station-level disparity
Chapra spans 1 CPCB stations with a 0-point spread (min 195, max 195); Patna spans 6 stations with a 39-point spread (min 154, max 193).