In April 2014, ACOG (the American Congress of Obstetrics and Gynecology) and the AAP (the American Academy of Pediatrics) published a joint statement rejecting Water Birth as a safe option for expecting parents.
The news caused many in-hospital birth centers and regular labor and delivery services to ban or slowly phase out water birth when they offered it before (such as Family Beginnings, in Dayton), or to cancel plans of offering it in the future, depriving many families of an increasingly popular comfort measure.
Evidence Based Birth just published a thorough analysis of the evidence used for the ACOG/AAP publication so you can decide what is safe for you and your baby: Evidence on the Safety of Water Birth.