Mr Bradbury holds the seat by a margin of 6.3 per cent, but has suffered a significant swing against him which favours Liberal candidate Fiona Scott.
With 72.1 per cent of the vote counted, Labor has suffered a six per cent swing, putting Mr Bradbury ahead by a wafer thin margin.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
"Tonight I'll go to bed not knowing whether or not my service to the community as an elected representative will continue," he told supporters at St Marys RSL on Saturday night.
"But can I say that each and every moment that I've been privileged to serve as a representative of this community I've treasured.
"I've thrown myself into with 110 per cent and I think I've made a difference."
