The Environmental Protection Agency (EPA) defines high-risk homes as:
- Homes with a lead service line.
- Homes with copper pipe and lead solder that were built before 1986.
- Homes with older brass fixtures.
In 1986, Congress enacted the "lead ban," which stated that not only public water systems but also anyone else who intends to install or repair drinking water plumbing connected to a public water system must use "lead-free materials."