Map made at the European Environment Agency.
The water exploitation index plus (WEI+) compares water use against renewable water resources. The map illustrates the relation between Urban Morphological Zone and the WEI+ at the sub-basin scale for summer months (July, August and September) defined in calendar year.
Source: https://www.eea.europa.eu/data-and-maps/figures/water-exploitation-index-plus-wei