Can I filter ocean water with the Puritii Water Filter? Administrator March 23, 2020 11:29 Updated The Puritii Water Filter was specifically designed to filter fresh water, not salt water. Related articles Does the Puritii Water Filter change the pH of water? Puritii Water Bottle & Filter After filtering, a test revealed there are still substances in my water. Why is this? Does the Puritii Water Filter meet NSF* standards? Are the Puritii Water Filters recyclable? Comments 0 comments Please sign in to leave a comment.