The federal Lead and Copper Rule dictates the sites for in-house testing. We must comply with the requirements of the rule. Lead-free plumbing laws were enacted in the U.S. beginning in 1986. The U.S. Environmental Protection Agency (EPA) has determined that homes built prior to 1986 are more at risk from lead leaching from in-house plumbing. Homes built after 1986 are far less likely to have lead plumbing components and, therefore, have a significantly reduced risk of lead leaching. By regulation, Kitsap PUD is required to sample – to the extent possible – only from homes built between 1983 and 1986.