Purnia vs Sasaram
Side-by-side air quality comparison between Purnia and Sasaram.
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 Sasaram averaged 109 — a 24-point (22%) gap, with Purnia the more polluted and Sasaram the cleaner of the two. On 731 days when both cities reported, Sasaram was cleaner on 487 of them; the average daily gap was 68 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Sasaram was 0.1% Severe and 37% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Sasaram 27 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Sasaram has improved by 166 AQI points (60.4%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Sasaram hit AQI 401 at Dada Peer (BSPCB) on 2021-11-28.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Sasaram spans 1 stations with a 0-point spread (min 148, max 148).