Purnia vs Sagar
Side-by-side air quality comparison between Purnia and Sagar.
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, Purnia averaged an AQI of 133 while Sagar averaged 96 — a 37-point (39%) gap, with Purnia the more polluted and Sagar the cleaner of the two. On 558 days when both cities reported, Sagar was cleaner on 412 of them; the average daily gap was 92 AQI points.
Seasonality & days
Purnia peaks in January, while Sagar peaks in November. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Sagar was 0% Severe and 69.9% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Sagar 57 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Sagar has worsened by 24 AQI points (33.3%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Sagar hit AQI 347 at Civil Lines (MPPCB) on 2024-12-25.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Sagar spans 2 stations with a 45-point spread (min 73, max 118).