A class action against Sydney Water over PFAS  is looming as mystery surrounds the sudden departure of a former executive.

Tom Tate indicates he was only half serious about sending rough sleepers into northern NSW as experts note that the underlying causes of homelessness need to be addressed.

Treasurer and Energy Minister David Janetzki failed to mention the incident in a major address a week ago, despite being briefed about the incident the day it happened.

Only one day after Wests Tigers confirmed he would be leaving the club when his contract expires, Lachlan Galvin is left out of their squad for the Easter Monday clash against Parramatta.