The document discusses lead levels in drinking water and regulations to limit lead. It notes the following key points: - Lead levels in drinking water have declined significantly since the late 1970s/early 1980s, due to fewer lead pipes and the Safe Drinking Water Act of 1996. - The Reduction of Lead in Drinking Water Act of 2011 lowered the amount of lead allowed in plumbing materials to 0.25%. - NSF International safety standards and an updated Appendix G place further restrictions on the allowable lead content of plumbing products and fittings as of 2014.