The closest Mikvah to Central Deerfield Beach is at the Boca Raton Synagouge. 

The Boca Raton Mikvah welcomes all married Jewish Women and Jewish brides regardless of their synagogue affiliation. The newly redecorated facility (located behind the main entrance to the Boca Raton synagogue) houses two mikva'ot (including a Chabad mikvah) and five private preparation room. All of the rooms are fully equipped with all of the items neccessary to prepare for immersion.

The women's mikvah is open every night of the year, with the exclusion of Yom Kippur and Tisha B'Av. The mikvah opens at 8:30 p.m. Sunday through Thursday and appointments are strongly recommended. Saturday nights, the mikvah opens one hour after havdalah for approximately one and a half hours.

To make an appointment, call (561)394-5854 and leave a message.  For more information, please see http://www.brsonline.org/mikvah.html