The presence of total Coliform and E-coli was found in three samples of routine drinking water.
The Tri-County Health Department said it’s monitoring the water.
“In the public health department and throughout the state, we monitor for bacterial diarrheal illness, and we will be able to detect if there is any increase. I don’t think, in the situation we’re in, there will be any detectable increase in diarrheal illness, ” said Dr. Paul Lewis, an officer with the Tri-County Health Department.
The Portland Water Bureau is performing an investigation to identify the cause of the contamination.
Contamination can occur when there is a loss of water pressure, a pipe breaks or exposure to outside elements.