99 percent of the Earth''s water is contained in oceans and as ice.The remaining 1 percent is fresh water.So for a population of approximately 6 billion people,we only have 1% available for use and this use includes industrial,domestic and agricultural usage.Agricultural usage accounts for 80% of the global consumption.Water has the effect of influencing how people live.It affects lives,not only demographically or politically but by shaping the very country itself.As a result,water quality management and monitoring programmes are a key requirement for governments to commit to providing such sustainable access to safe water. Это и многое другое вы найдете в книге A Review of Water Quality Monitoring (Sarah Kiggundu)