Hold the pomegranate half over a bowl and smack the rind with a large wooden spoon. The seeds will eject from the pomegranate directly into the bowl, leaving only a few more deeply embedded seeds to remove. You can run your fingers to get them out.
Place pomegranate arils and water in a blender and blend for 1 to 2 minutes.
Strain the juice using a strainer (or a sieve) lined with paper towel over a large bowl to catch the juice.
Leave a few minutes and then carefully squeeze the paper towel to collect as much juice as possible.
Keep pomegranate juice in a sealed container and drink within the next five days.