Gauteng acting MEC for health Jacob Mamabolo confirmed the PPE was found floating in a river at the Irene Country Club.
Mamabolo said a criminal case had been opened.
Gauteng police could not immediately confirm whether a case had been opened.
The National Education, Health and Allied Workers’ Union (Nehawu) said it was “unacceptable that PPE, which is needed by front-line workers to protect themselves and save the lives of our people, are dumped in a river.
“In the video one can see gloves and masks, which are in short supply in health-care facilities across the country.”