|This is an example of an 1,800 square foot Mikveh located in the city of Pasadena. It is said that before a Synagogue is built a congregation must build a Mikveh. Several biblical regulations specify that full immersion in water is required to regain ritual purity after ritually impure incidents have occurred. Most forms of impurity can be nullified through immersion in any natural collection of water. Some, such as a Zav, however require “living water,” such as springs or groundwater wells. Living water has the further advantage of being able to purify even while flowing as opposed to rainwater which must be stationary in order to purify. The mikveh is designed to simplify this requirement, by providing a bathing facility that remains in ritual contact with a natural source of water.