Across
- 1. aquifer
- 5. removing harmful bacteria and microbes
- 6. the process where surface water trickles into
- 7. frozen layer of soil in polar reigons
- 10. when waste or other material causes water
- 11. water
- 12. water that is suitable to drink
- 14. the measure of how easily water can flow
Down
- 1. any heating of natural water that results
- 2. an increase of nutrients in water
- 3. ground
- 4. become harmful
- 8. network of systems that drains an area of
- 9. body of water above ground
- 13. a ridge or higher ground that separates watershed
- 15. a body of rock that can store alot of water