Water Quality

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Across
  1. 3. unwanted substances
  2. 6. used to kill plants
  3. 8. not clear
  4. 10. used to kill animal pests
  5. 11. contains feces and urine
  6. 12. artificially raising the temperature
Down
  1. 1. amount of solute in solution
  2. 2. removing salts and minerals from water
  3. 4. underground pipes carrying used water
  4. 5. using living things to remove contaminants
  5. 7. used bath water
  6. 9. an area where water collects