[header] How to desalinate water [title] Use bottled drinking water and iodized salt. [step] Before you can desalinate the water, you will need to create saline water, or salt water. Do this by buying a bottle of drinking water and iodized salt from your local grocery store. 
You can also use a bottle of tap water if you do not want to buy a bottle of water. [substeps] If you happen to live near an ocean, you can skip these materials and fill a bottle with seawater.