potable water

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Across
  1. 2. a river
  2. 3. where we defecate
  3. 5. periods of dry climate and low water levels
  4. 6. healthy enough to drink
  5. 7. too salty to drink
  6. 9. pass the water through membranes
  7. 10. caused by too much nitrogen and phosphorus in the water
Down
  1. 1. one way to sanitize water
  2. 4. cost alot of money
  3. 5. reduces the minerals in water
  4. 6. has NO additional chemicals in it
  5. 8. contains 2 hydrogen atoms and one oxygen atom