Yes, it is.
You can refer to these two articles written by mothers who went through water birth in Singapore (though the account in the second link took place in NUH):
http://sg.theasianparent.com/my_home_water_birth_in_singapore/
http://www.fourtrimesters.com/waterbirths/jos-water-birth/
Dr Lai (mentioned in the first article) is one of the few (or perhaps the only one) doctor who is open to home birth right now.
http://acompanyforwomen.com.sg/