How many ppm in water is safe?

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  1. #below
  2. #according
  3. #better
  4. #limit
  5. #should
  6. #level
  7. #drinking
  8. #recommended
  9. #recovery
  10. #600mg
  11. #problem
  12. #300mg
  13. #purpose
  14. #drink
  15. #having
  16. #water
  17. #kidney
  18. #ideal
  19. #people
  20. #permissible