Across
- 3. act setting guidelines for the safety of drinking water
- 4. area where currents have pushed trash to a certain spot, where it then builds up
- 7. virus causing particles
- 11. a type of waste that sucks up a necessary, life-giving resource (usually bacteria)
- 13. act protecting water sources from pollution
- 14. (abbr)levels of oxygen in the water, testable
- 15. pollutant made of nitric acid
- 16. (sewage treatment) removal of hard wastes
- 17. pollutant mostly found in runoff from fertilizer
- 19. (bacteria) that does not require oxygen for growth
- 20. place in the ocean where pollution has killed off wildlife and nothing can live
Down
- 1. (bacteria) that requires oxygen for growth
- 2. (sewage treatment) intense filtering of water and small pollutant particles
- 5. increased oxygen levels in the water resulting in algal blooms
- 6. a specific place where pollution comes from
- 8. a general cause of pollution from a source
- 9. growth resulting from eutrophication and presence of oxygen in water
- 10. (sewage treatment) removal of organic materials
- 12. underground water processor used to clean building sewage
- 18. a bacteria whose presence is tested to determine the presence of human sewage in a water source