Purnia vs Shillong
Side-by-side air quality comparison between Purnia and Shillong.
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 Shillong averaged 75 — a 58-point (77%) gap, with Purnia the more polluted and Shillong the cleaner of the two. On 446 days when both cities reported, Shillong was cleaner on 406 of them; the average daily gap was 132 AQI points.
Seasonality & days
Purnia peaks in January, while Shillong peaks in February. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Shillong was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Shillong 113 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Shillong has worsened by 41 AQI points (120.6%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Shillong hit AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Shillong spans 2 stations with a 2-point spread (min 42, max 44).