Water pollution (English: Water pollution) is a significant cause of water contamination in the water. Either in the form of suspended solids The solution in the form The contaminants will look different according to the sources of pollution include. 1. industry 2. Dwellings and community 3. agricultural effluents from industrial The wastewater from the production process, such as cleaning materials, cooling, cleaning machinery, etc. pollution from industrial effluents. Characteristics will vary accordingly. Type of product Manufacturing and other general industries. Same type And a similar process. The characteristics of the wastewater. And similar effluents such as chemical plants. Effluent will contain chemicals that are acidic - alkaline. Animal feed factory Wastewater would be impurities in the form of food waste, animal waste, rice bran and soybean meal, bone meal. The effluent Dwellings and community Especially in densely populated communities such as Bangkok municipalities in each province. Every household will be releasing effluents into water trough public. And those effluent to flow into natural water resources further. Typical characteristics of wastewater from dwellings and community will be degradable by biological methods are also disposing of garbage and refuse. Directly into rivers and canals This will add doubt to the various natural sources. The effluent from agricultural Include crop and animal husbandry. In the process, often with the use of fertilizers and crop protection chemicals. Pesticides and animals, which most farmers use recklessness. Substance spread to water, which may occur during spraying. Leaching by rain Washed containers or equipment spraying water.