Across
- 3. A lake the stores water for human use,
- 5. Count ,Test of water contamination that indicates the extent of fecal matter present in the water,
- 8. measurement of how clear the water is
- 9. A compound found in fertilizer and waste products,
- 10. A rapid increase in algae population,
Down
- 1. The measurement of how acidic or basic a substance is,
- 2. Preventing the wasteful use of a resource,
- 4. The saltiness of a body of water,
- 6. The process where air is mixed with or dissolved in a liquid,
- 7. A compound found in waste and cleaning products,