From A Wiki in the Desert
Salt Water is found in the Red Sea and the Mediterranean Sea. It can be gathered in Jugs just like normal water.
- 75 needed to make 1 Salt in a Tub
- 150 needed to make 1 Potash in a Tub (See Discovery tab for more detailed observed results)
- Make sure you have Empty Jugs available to gather water. Then head to the seaside and use the normal Gather Water icon. You will get a different dialog option that confirms you are getting Salt Water and not regular.