What are the two major sources of water pollution?

Water pollution can be caused by soil erosion. Due to agriculture and mining, which requires deforestation, the soil is not properly anchored down by the tree roots. When a heavy rain comes, the soil gets washed into the water bodies and cause pollution.

Agricultural runoff of synthetic fertilizers and pesticides also cause water pollution.

Factories sometimes discharge chemical and other waste into the water bodies located conveniently around the area. These waste are then channeled all over the rivers and lakes where it becomes contaminated.