The discovery was made during the survey that was completed last week.
Research shows that some E-coli can cause illnesses such as watery diarrhoea or dysentery through contaminated water or food.
National Project Coordinator, Silia Ledger said they decided to run bacteriological testing of the water from some houses while doing the survey.
“We did not expect the water tests would find E-coli present,” she said.
