Fig. 7
Domestic wells per area in cities that rely exclusively on surface water (a), both surface water and groundwater (b), and exclusively on groundwater (c), based on the classification from the Brazilian National Water and Sanitation Agency56. Boxplots of domestic wells per area unit for cities in each category (d–f) with boxes indicating 25th and 75th percentiles and bars representing 10th and 90th percentiles, solid horizontal lines denoting median, and x marks indicating mean value.
