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No official information has been found on water withdrawal, but estimated values give a total water withdrawal in 2010 of 1.445 km3, of which 94.4 percent was for agricultural purposes, 4.2 percent for municipal and 1.4 percent for industrial purposes (Table 4 and Figure 1).
Roughly 90 percent of the population is concentrated within the coastal area and thus all residents of the coastal area depend wholly on groundwater supply to meet their domestic needs. One exception is the Georgetown area, which utilizes about 10 percent of surface water from the EDWC conservancy. Intermediate savannahs and hinterland used a mixture of surface and groundwater. Nationwide, water supply facilities included about 178 groundwater wells and eight surface water sources in 2000.
In Guyana many businesses that use large quantities of water have their own wells to meet their needs. These include the bottling of beverages, water, other manufacturing and food processing industries.
There are three major water treatment facilities to produce drinking water: in Georgetown, New Amsterdam and Guymine.