Toxic chemical concerns for NSW town

The NSW government's handling of a toxic chemical spill in a Hunter Valley town has been labelled "appalling" by the state opposition.

Testing in May at Stony Creek and Swamp, near Maitland, detected concentrations that far exceeded the recommended level of PFAS for drinking water.

Heavy rainfall in March is thought to have washed the chemicals from a derelict industrial site into the nearby creeks, the Environmental Protection Authority said in a statement last week.