water resources

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Across
  1. 3. a rover signed by a treaty in 1996
  2. 5. an area where rainfall is collected
  3. 7. water that doesnt contain salt
  4. 9. a method of removing salt from water
  5. 12. fresh water stored in rivers
  6. 14. water produced in singapore
  7. 15. harmful substances are introduced to the water
Down
  1. 1. fresh water stored underground
  2. 2. another name for cleaned water
  3. 4. limitation or restriction
  4. 6. cleaned water
  5. 8. a famous reservoir
  6. 9. a process of removing salt from the water
  7. 10. limited amount of water
  8. 11. lack of supply
  9. 13. a demand for water