The utility reported that sales people have been visiting residents in Alkimos recently, saying they had done water quality tests and alleging that the water was not safe to drink.
Water Corporation manager Nick Turner said the claims had no foundation.
‘Some people buy and use water filters and we have no issue with that at all,’ he said.
‘The choice to install a water filter is a matter of personal preference, but it is outrageous for a sales person to make completely untrue allegations with regard to the safety of our drinking water.’
Mr Turner said the information supplied by those sales people suggested there was a high incidence of waterborne diseases in the area and water quality issues with the local supply.
He said misleading claims about water, which consistently met health-related performance targets set by the Department of Health, could cause ‘undue worry and stress’ to customers.
The utility is working with Consumer Protection WA to investigate misleading claims across WA, and said customers could report sales people who made adverse or emotive claims about the water quality by calling 13 13 75.
The Times contacted a water filter company that had been doorknocking in Alkimos recently, but it declined to comment.