Across
- 3. the amount of oxygen in water
- 6. a measure of how acidic/basic water is
- 7. the amount of cloudiness in the water
- 8. suitable for drinking
- 9. from a single point/source
- 10. the process of improving the quality of water
- 11. a set of compounds
Down
- 1. from many point/sources
- 2. an organism in an ecosystem
- 4. the job of taking care of something
- 5. a body of water