Family Search- Beta
Emergency Preparedness and Food/Water Storage
Food and Water in an Emergency(pdf)- This is a publication put out by FEMA. .
Food Storage Calculator
Basic Water Storage Guidelines.
EPA- EPA's FAQ on all things water. You can search it for all sorts of info such as emergency water treatment and sources.
Emergency Essentials- One of many sites that sells commercial water storage equipment. You can find containers that are specifically made for long term water storage.
I'll add more as I find them!