Hi, David —

Go to a Catholic priest and ask him to bless your water.

Some parishes have pre-made bottles of holy water or holy water fonts that contain holy water, usually at the entrance to a Catholic parish. If the parish doesn't have any pre-made bottles of holy water, just get a bottle container, they are usually plastic, and fill it up at the entrance to the Church. We believe that when the priest blesses the water, Jesus, in the person of the priest, blesses the water.

Deacons can also bless water.

Hope this helps.

Mike Humphrey