What are the main causes of water pollution?

raw petroleum leaks and oil spills that occur when ships or tankers are transporting cargo.

natural catastrophes such as earthquakes, landslides, tsunamis, and floods, etc.

radioactive waste from nuclear reactions being released.

combining insecticides, herbicides, pesticides, and chemical fertilizers with water.

animal carcasses being disposed of in water sources.

disposal of industrial waste water containing dangerous chemicals.

cleaning dishes, taking a bath, and doing laundry close to water sources.

utilizing pond and river banks as outdoor restrooms.

dumping waste into water sources.

drinking water contamination that occurs when sewage and drinking water transportation pipes are combined in urban areas.

I hope this response was helpful to you.

The main causes of water pollution include industrial discharge, agricultural runoff, improper waste disposal, sewage and wastewater discharge, oil spills, and atmospheric deposition of pollutants.