... river and canal is widely used in the upper parts of the delta, where the water quality isnot effected by high concentration of salinity and/ or acidity and/ or pollution. In An Giang and Kien Giang, ... nations such as Finland, Denmark, France, Japan, the Netherlands, Australia, Sweden, South Korea and Germany. Looking at urban markets anywhere, we can count more than 20 trade-marks of bottled drinking ... many water supply and environmental sanitation programs. Notice that, in the present time, about 75% of the inhabitants in the urban and 35% in the suburban and rural have access to clean...