市鎮地區家庭、機關團體、學校、工商事業排出的廢水中，含有糞 便、油脂、

Home town area, wastewater agencies and organizations, schools, industrial and commercial undertakings discharged, contain feces, grease, food waste, chemicals, etc., in which a large number of bacteria and organic matter are the main source of water pollutants. <br>2. pollutant industrial manufacturing process material, sub-materials, finished products, intermediate products, byproducts, or other materials of energy (e.g., cooling water) are formed. <br>3. livestock activities in a large number of animals row relics without proper treatment that is to be discharged, will also have a large number of bacteria and organic matter into the water, causing pollution. <br>4. The agricultural activities of pesticides, fertilizers and other substances, the permeate flow through the groundwater and surface water or into the water, so that the contaminated water environment. Most pesticides for fish or other aquatic organisms are toxic enough to harming the environment. <br>5. Mining as mineral separation, washed with water while dressing, the flush water contains a lot of sand, the solubility of toxic substances (such as copper, iron, zinc, lead), or corrosive substances (e.g., sulfuric acid), which flows after the river or lake can cause pollution of such water bodies, destruction of the ecological balance. <br>6. landfill leachate in, early in landfills because it contains high concentrations of organic matter, is one source of water pollution. <br>And factory exhaust gas scrubbing due to rainfall and dust into the surface of the water, can cause water pollution; lysates with increasing water float 7. forest harvesting, farming, civil engineering and the like caused by human factors.

The water discharged from the city's homes, schools, and businesses contains fluids, greases, slugs, chemicals, etc. , and a large number of germs and substances are the main sources of water pollutants.<br>2. Contaminants formed by raw materials, finished products, medium products, side products, other materials or energy (e.g. cold water) during the process.<br>3. A large number of animal sons and drinks in animal husbandry activities are discharged without proper treatment, and there will be a large number of germs and substances that enter the water, causing pollution.<br>4. The water environment is polluted by the flow of surface water or groundwater. Some of the diseases are toxic to or other aquatic organisms, enough to harm the environment.<br>5. When the object is divided, wash with water at the time, this kind of washing water contains a large amount of sediment, solubility toxic substances (e.g. slugs, slugs, slugs, slugs, etc.) or corrosive substances (e.g. sulfuric acid), which will flow into rivers or lakes to produce water pollution, break the balance.<br>6. The water in the landfill, which is also one of the sources of water pollution, is due to the high degree of radon in the early stage of landfill.<br>7. The increase in plankton and solutions in the water, caused by factors such as deforestation, farming, civil engineering, etc., and the water that is released by the waste from the forest and the water that is washed into the surface by the washing of rainfall can cause water pollution problems.

The waste water discharged by families, government organizations, schools and businesses in towns and cities contains feces, grease, kitchen waste and chemical agents, among which a large number of bacteria and organics are the main sources of water pollutants.<br>2. Pollutants formed by raw materials, by-products, intermediate products, by-products, other materials or energy (such as cooling water) in the process of industrial manufacturing.<br>3. A large number of animal remains in animal husbandry activities will be discharged without proper treatment, and a large number of bacteria and organic substances will also enter the water body, causing pollution.<br>4. Pesticides, fertilizers and other substances used in agricultural activities enter the water body through the infiltration and flow of surface water or groundwater, which makes the water environment polluted. Some pesticides are toxic to fish or other aquatic organisms, enough to damage the ecological environment.<br>5. When mining, it is a separation mineral. When mineral processing, it is washed with water. This washing water contains a lot of sediment, dissolved toxic substances (such as copper, iron, zinc, lead, etc.) or corrosive substances (such as sulfuric acid). When it flows into rivers or lakes, it will cause pollution of this kind of water body and destroy the ecological balance.<br>6. The seeping water in the landfill is one of the sources of water pollution because of the high concentration of organic matter in the initial stage of landfill.<br>7. Deforestation, cultivation, civil engineering and other factors lead to the increase of plankton and dissolved matter in the water body; as well as the gas and dust discharged by the factory entering the surface water body due to the washing of rainfall, can cause the problem of water pollution.<br>