The Lead and Copper Rule (LCR) is a regulation that the EPA established in 1991. Through this Rule, water systems are required to monitor customers’ drinking water and inform them of any high concentrations of lead and copper.
The EPA and the New Hampshire Department of Environmental Services have provided excellent reading material as well as handy forms to help our customers to stay informed.
Here is a link to NHDES’ Lead and Copper Rule
Another related topic is the Corrosivity of water lines. This corrosivity can happen to the main water lines as well as to a homeowners lines. NHDES provides plenty of information on the topic within their Corrosivity of Water Lines paper.