Bettiah vs Purnia
Side-by-side air quality comparison between Bettiah and Purnia.
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, Bettiah averaged an AQI of 127 while Purnia averaged 133 — a 6-point (5%) gap, with Purnia the more polluted and Bettiah the cleaner of the two. On 633 days when both cities reported, Purnia was cleaner on 328 of them; the average daily gap was 63 AQI points.
Seasonality & days
Bettiah peaks in November, while Purnia peaks in January. Bettiah logged 3.2% Severe days and 32.3% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Bettiah 20 days, Purnia 14 days.
Year-over-year progress
Bettiah has improved by 73 AQI points (36.5%) from 2021 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Bettiah reached AQI 470 at Kamalnath Nagar (BSPCB) on 2023-01-01; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Bettiah spans 1 CPCB stations with a 0-point spread (min 173, max 173); Purnia spans 1 stations with a 0-point spread (min 176, max 176).