Water Pollution

4. An area of ground above a septic tank used for breaking down contaminants in waste water
6. Water that can pollute bodies of water due to improper treatment
7. Artificial ponds used to put livestock wastewater in
11. Passed in 1972, allowing for the protection and restoration of aquatic ecosystems
12. An insecticide that can travel up the food web and concentrate in large birds, leading to thinner egg shells and decreased birth rates

1. A specific location that adds pollution to an area
2. The amount of dissolved oxygen that the organisms in a body of water require
3. Heavy metal that is naturally occuring, but is added to the environment through the burning of coal
5. An excess of nutrients that creates a spike in bacterial populations in a body of water
8. The process of corrosive substances landing on plants and seeping into soil as during rain or snowfall
9. A metal that was used to construct water pipes and is toxic to humans
10. An area in a body of water that has low amounts of dissolved oxygen and is inhospitable to aquatic life