1. Waste water from home Residential community with many households. Commercial districts required water consumption. Wastewater from toilets, and most of the water from the washing. These include the organic food waste, fats, soaps, detergents, inorganic substances and other contaminants in sewage water flowing into these rivers. Also, if the sewage pathogens such as bacteria and viruses that harm it will cause disease 2. Wastewater from industrial plants Wastewater effluents from industries including manufacturing systems. Cooling System Office and residential buildings Shops and cafeterias The mixed material may be organic compounds, inorganic acids, alkalis, chemicals, heavy metals, radioactive substances, toxic chemicals, sand and other filth. When dumped into rivers. Will increase the amount of these substances or toxic to organisms in the water. The putrid smell and unsightly color 3. Fertilizers used in agriculture The main fertilizers used in agriculture, including nitrogen and phosphorus. Phosphorus in the model year of phosphate can be attached to the soil. So there is a minority that flows with water. Therefore, substances that cause problems are nitrogen 4. soil erosion. In some areas, such as water reservoirs deterioration and erosion of soil. The water has a high turbidity, color, odor and taste 5. livestock. If pets eat grass to cover soil, excessive soil erosion, water when it rains. Were on the water to flow into the source of the problem was sixth. Pesticides and herbicides. Most of the chemicals are sometimes poisonous. When leached into the water. It is toxic to plants and animals that live in the water. If we apply it to dangerous toxins with seven. Wildfire If a wildfire in the area where the source of origin of water to make a waste sludge, ash, sand, and water pollution. Flow into the water a lot. This will adversely affect the quality of water to the living. It may be a reservoir or SE shallow water due to the formation of ash and sludge in the eighth. The lack of control of land use. Land use two or around water. The lack of regulation or provision. Would cause detriment to the quality of water, so it should be delimited or not to extend the waterfront community or the plant that brings water to take advantage of the spa cover.
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