Water Pollution

2. Used to describe the health of a water system
5. An area or ridge of land that separates waters flowing to different rivers, basins, or seas.
6. An area of the ocean that is depleted of oxygen, frequently due to pollution.
8. The degradation of water quality
9. Wastewater and different kinds of waste found in it.
10. Inorganic compound with the chemical formula H₂O.
11. Introduction of contaminants into the natural environment that cause adverse change.
13. Any substance found in water, can be harmful or harmless.
15. Chemicals intended to kill insects and other organisms that damage crops.

1. Water generated after the use of freshwater.
3. Draining away water (or substances carried in it) from the surface of an area of land.
4. Tank in which solid organic sewage is decomposed and purified by anaerobic bacteria.
7. The process of obtaining freshwater from salt water by removing the salt.
12. Site of disposal of waste materials also known as garbage dump.
14. Underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand, or silt) from which groundwater can be extracted.
15. A measurement of how acidic or basic the water is, on a scale of 0-14.