Wessex Water is replacing lead piping at older properties in Bath.
The water company is offering some Bath home owners the chance to have their lead piping replaced free of charge.
Lead piping was used in properties built before the 1970s and some Bath homes still have it. The firm, which has its headquarters at Claverton Down, is only offering the work to homes with higher lead levels in their drinking water.
A spokeswoman for Wessex Water said the company took random water samples across Bath as part of its routine water quality monitoring programme and it was this testing that had begun identifying where lead piping was still being used.
She said: "Wessex Water does not have any lead water mains. It is, however, common in Bath, due to the age of the properties, to find properties with either lead internal plumbing or with lead service pipes."
She added: "There are no plans to change the wider network. We will continue to take water quality samples from the area. If we identify any lead in samples we will investigate and if necessary carry out pipe replacement."
The Drinking Water Inspectorate allows 20 micrograms per litre (ug/l) of lead in drinking water, but this is to be reduced to 10 ug/l in December. To help it achieve the new standard Wessex Water has set itself a lower target of 3 ug/l.
The spokeswoman said: "Our long-term intention is to replace all lead pipes. Setting a low trigger for lead helps us identify properties and gives us an opportunity to offer customers a free lead pipe replacement."
The cost of the work can depend on the property but can be between several hundred pounds to more than £1,000 in some situations.