Water pollution is the term used to describe any unsafe materials, toxic or other substances that are contaminating a water source. This could be composed of biological and chemical substances, and the source of water can be ponds, lakes, seas, oceans, or water systems used for drinking and bathing by mankind.Rainfall consists of very pure water, but since water is a solvent, many substances dissolve in the water as it will fall on the ground
The most dangerous type of water pollution are chemicals dissipate from homes and businesses and in some cases, the human or animal waste materials. Some of these chemicals will dissolve in the water and cannot be easily removed except using chemical processes, adding chemicals which react with the dissolved solvents to form salts which can be easily removed.
Comparatively mud in the water can be easily removed using filters or will settle at the bottom due to sedimentation. The effect of biodegradable waste like organic waste will be limited, however plastics and other substances can cause many problems including flooding of cities
