Sewage from houses and communities, especially those in communities with a population living in a dense, such as the Bangkok municipal area in each province every household to wastewater into public sewer and water table, leaving them to natural water sources flowing into the next. In General, the characteristic properties of wastewater from households, buildings and communities will be able to degrade by the method of biology. There are also disposable waste and sewage into several rivers, canals, directly as well as adding water to natural dirt.Wastewater from agriculture, including crop and animal In the process of cultivation is often the use of fertilizer and chemical protection. Get rid of pests and animals that most farmers use lack of caution. Make the chemicals spread to water which may occur during the spray substance. Washing by rain. Clear containers, packaging or spraying equipment in the water.
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