The Ministry of Health is on Tuesday expecting the results of samples taken from the Rio Cobre last week.
The samples were collected from the contaminated river on Thursday.
Everton Baker, Director of Environmental Health in the Ministry, said on Tuesday morning that the lab has been working assiduously to have the analysis ready.
"I can't say the exact time but it's going to be ready today. I haven't seen the results, I don't know the outcomes. So, as soon as we look at the results we can make a release," he told Radio Jamaica News.
Mr. Baker said the results of the tests will be communicated to the relevant agencies for them to decide "what needs to happen thereafter".
Residents of several St. Catherine communities are anxiously awaiting the restart of operations at the National Water Commission's Spanish Town Treatment Plant.
The National Irrigation Commission resumed services on the weekend after it received clearance from the St. Catherine Health Department.