DESCRIPTIVE TEXT

DESCRIPTIVE TEXT

A brief description of the sources of pollution are:
Natural ground water contains some impurities, even if not affected by human activities. The types and concentrations of natural impurities depend on the nature of the geologic material from which ground water moves, and quality of makeup water. Groundwater that moves through sedimentary rocks and soils may occur in large numbers and composite materials such as magnesium, calcium, and chloride. Some aquifers have high natural concentrations of dissolved constituents such as arsenic, boron and selenium.
Agriculture: Pesticides, fertilizers, herbicides and animal waste are sources of groundwater pollution from agriculture. These sources of agricultural pollution are varied and numerous: the leakage of fertilizers and pesticides during handling, loading and runoff for laundering pesticide spray or other application equipment, use of chemical upslope and a few hundred meters wells or water supply wells. Agricultural land is not sufficient drainage is considered by many farmers as land that has lost the benefit of production. Drainage wells then serve as a direct conduit to groundwater from wastewater.
The storage of agricultural chemicals near water pipes underground, open wells and abandoned wells and tanks or surface depressions where water tends to stagnate. Contamination may also occur when chemicals are stored in areas not covered, which does not protect against wind and rain, or stored in places where ground water flows from the chemical storage wells.
Industrial: Manufacturing and service industries have high demands for cooling water, process water and water for cleaning. Contamination of groundwater occurs when the water used is returned to hydrological ciclor.
The modern economic activities require transportation and storage of materials used in manufacturing and construction process.
Residential: residential water systems can be a source of high amounts of contaminants such as bacteria, viruses, nitrates, organic matter and human waste. Injection wells used for domestic wastewater disposal (septic systems, latrines, drainage wells to collect rainwater, wells, ground water recharge) are of particular concern for the quality of groundwater if they are located near the wells supplying the water used for drinking.