Water Pollution

3. An essential nutrient containing phosphorus and oxygen.
6. An underground layer of sand, gravel or rock that stores or conveys water below the surface of the soil.
8. Underground water in an aquifer, used for drinking water in 75 percent of Minnesota households.
10. Chemicals used to kill undesirable vegetation.
12. Aboveground water, such as streams, rivers and lakes.
13. That portion of precipitation or irrigation water that flows off a field or paved area and enters surface water.
15. Rain with a higher than normal acid range. Caused when polluted air mixes with cloud moisture

1. The surrounding land area that drains into a lake, river or river system.
2. Solid material that is in suspension, is being transported, or has been moved from its original location by air, water, gravity or ice.
4. An unusual, sudden or excessive abundance of algae. Algal blooms can adversely affect water quality
5. Indicates the degree to which light is scattered in water.
7. Chemicals used to kill or control pests, such as weeds, insects, fungus, mites, algae, rodents and other undesirable agents.
9. An inorganic form of nitrogen, is contained in fertilizers, septic system effluent, and animal wastes
11. Liquid flowing out of a system.
14. Common components of fertilizers and explosives.