water pollution

2. the contamination of water sources by substances which make the water unusable for drinking, cooking, cleaning, swimming,and other activities.
4. a substance that pollutes something, especially water or the atmosphere.
8. excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.
9. the measure of relative clarity of a liquid.
10. any single identifiable source of pollution from which pollutants are discharged

1. results from land runoff, precipitation, atmospheric deposition, drainage, seepage or hydrologic modification.
3. process where too many nutrients, mainly nitrogen and phosphorus, are added to bodies of water and can act like fertilizer, causing excessive growth of algae
5. occurs in aquatic environments as dissolved oxygen
6. establishes the basic structure for regulating discharges of pollutants into the waters of the United States and regulating quality standards for surface waters
7. made up of fine particles.