Figure 1. PM2.5 mass concentrations at sampling sites on different sampling dates. Horizontal line represents National Ambient Air Quality Standard (NAAQS; 60 µg/m3 for 24-hour average)

From

Spatial Variability of Finer Particulate Matter (PM2.5) Mass Concentrations over the Jammu Urban Area

Shivali Gupta, Akanksha Rajput, Rakesh Kumar

Applied Ecology and Environmental Sciences. 2021, 9(4), 465-469 doi:10.12691/aees-9-4-6