Diepkloof mortuary in Soweto was the worst affected, said Democratic Alliance (DA) health spokesperson Jack Bloom on Wednesday.
"Families are suffering extreme distress by the delay in releasing the bodies of their loved ones for burial. Diepkloof mortuary is the worst affected," Bloom said in a statement.
"We cannot have a situation where bodies pile up in mortuaries, causing further anguish to bereaved families."
Forensic pathology assistants in the province downed tools over salaries and working conditions.