Mumbai vs Purnia
Side-by-side air quality comparison between Mumbai 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, Mumbai averaged an AQI of 93 while Purnia averaged 133 — a 40-point (43%) gap, with Purnia the more polluted and Mumbai the cleaner of the two. On 603 days when both cities reported, Purnia was cleaner on 419 of them; the average daily gap was 79 AQI points.
Seasonality & days
Mumbai peaks in December, while Purnia peaks in January. Mumbai logged 0.5% Severe days and 34% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Mumbai 58 days, Purnia 14 days.
Year-over-year progress
Mumbai has improved by 4 AQI points (4.1%) from 2016 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Mumbai reached AQI 500 at Vile Parle West (MPCB) on 2022-08-15; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Mumbai spans 29 CPCB stations with a 74-point spread (min 77, max 151); Purnia spans 1 stations with a 0-point spread (min 176, max 176).