Thank you, organicem, but as has been pointed out by several contributors, even talking to the midwives concerned is problematic because they themselves will give conflicting information. It may be possible to have a waterbirth at these hospitals if you are lucky enough to encounter a midwife who is willing to circumvent the hospital policies, but this is by no means guaranteed.

The safest way to ensure you can have a waterbirth is to access a birth centre which allows for waterbirth as part of their policy, or to have a homebirth. You will not be guaranteed a waterbirth at Nepean or Blacktown, or any western sydney hospitals that I am aware of.