In my area , they will change the water pipe, but the home owner has to pay the bill as there is no evidence that drinking through a lead pipe is harmfull ( water boards words , not mine )
When I was just trawling the net about lead pipes, this the veiw by the Yanks, they tend to be more honest than our lot
Read towards the bottom
Water Safety: Drinking Water: Lead-Pipe and Lead-Solder Concerns - HealthyHouseInstitute.com