Cause water pollution from agriculture. For planting may require the use of fertilizers or chemicals to help increase productivity. Therefore, it is likely to be swept into the water by the process of leaching of rain. These things can not be avoided to spread into nearby water. This may also be due to the cleaning of tools and equipment that have impurities and toxins into the water. Causes sewage Including the transfer of manure and animal body wash will make the water quality deterioration as well.