Water storage resources
Of all the daunting tasks a prepper faces, it's water treatment/storage. Storing bottled water is takes so much room, but is essential. At one time, I had nine cases of bottled water. That may sound like alot, but it really isn't considering water is used for everything you and your family do in daily life. Water storage is an ongoing battle, but I deal with it. I constantly rotate my stock and rearrange and make the necessary room for the water.
Here is a primer for water storage:
https://preparedldsfamily.blogspot.com/2012/01/how-to-store-emergency-drinking-water.html