- Impact on the quality of our waters
- of urban origin. Wastewater from homes and city services contain fecal waste, leftover food and various chemical products such as detergents, bleaches, etc, highly contaminated.
- of industrial origin. Industrial processes generate different types of contaminated waste. Thus, mercury and other heavy metals, organic substances such as oils and fats, acids and other chemicals change the pH of the water.
- of agricultural origin. Due to the use of fertilizers and pesticides that are washed away by rain or irrigation water into rivers or groundwater. Or by the accumulation of animal manure produced on livestock farms.
The global freshwater control was multiplied by feeling along the twentieth century, almost twice the global population increase over the same period. To address this situation have been used both to surface water as groundwater and both have accused the increase of consumption. Thus, in many parts of the planet has created a condition known as water stress, in which demand is greater than the supply of water with required quality.
