The settlement of urban communities in the country. Will develop in the area along the canal by using water, both in the consumer goods, transportation, as well as a source for treatment. In the past.The dirty caused by wastewater has small volume, water resources, can support the wastewater that let down. No spoilage. But when the population is large. The release of waste water into the river.The water then spoilage cannot be used as the original. As is happening in the river several lines in
The drainage from the residential houses, industrial and agriculture such as farm animals into rivers, streams, without treatment. Or reduce contamination of waste water before. Causing such problems.The dirty drain into the river. Most of the informed source water lost from activities in urban parts of the river basin. The rest of the Chao Phraya River approximately 25 is wastewater from factories.Five from agricultural areas and other activities.