Can I filter ocean water with the Puritii water filter? Administrator August 17, 2017 18:55 The Puritii filter was specifically designed to filter fresh water, not salt water. Related articles Puritii Water Bottle & Filter Does the Puritii Water Filter change the pH of water? Are the Puritii water filters recyclable? What can I filter through my Puritii water filter? Is it safe to boil the Puritii water bottle? Comments 0 comments Please sign in to leave a comment.