Across
- 2. a figure expressing the acidity or alkalinity of a solution based on the amount of hydrogen ions
- 4. substance having a pH of more than 7
- 8. pollutants that are emitted from multiple sources.
- 10. are living organisms used to monitor the health of the environment
- 11. when algae feed off nitrates and grow or produce rapidly
- 12. the contamination of water bodies very often by human activities.
- 13. a process that removes solids that float and settle in the water.
- 16. a water treatment process where solids form larger clusters, or flocs, to be removed from water
- 17. measure of the amount of oxygen dissolved in water
- 21. an agency of the United States federal government whose mission is to protect human and environmental health
- 22. compounds made up of nitrogen and oxygen
Down
- 1. the chemical water treatment process used to remove solids from water
- 2. safe to drink
- 3. the removal, deactivation or killing of pathogenic microorganisms
- 5. the chemical, physical, and biological characteristics of water based on the standards of its usage.
- 6. amount of salt dissolved in water
- 7. process of removing or reducing the concentration of particulate matter
- 9. substance having a pH of less than 7.
- 14. process by which nutrients in a lake buildup over time, causing an increase in the growth of algae.
- 15. pollutants that belong to a single source.
- 18. compounds made up of phosphorus and oxygen
- 19. the quality of being cloudy, opaque, or thick with suspended matter.
- 20. substance having a pH of 7