Problem Overview

There has been concern over the poor air quality in Bulgaria, which has the highest PM2.5 concentrations of all EU-28 member states in urban areas over a three-year average, and PM10 daily mean concentrations of 77 μg/m3 (EU limit value is 50 μg/m3).

Visual analytics will be used to reveal spatio-temporal patterns of air quality in Sofia City (Sofiya-Grad) and to identify issues of concern.