Other sources of lead include plumbing fixtures (faucets, valves, fittings, etc.), indoor copper plumbing pipes with lead solder, and lead paint. Lead paint in homes is typically the greatest contributor to lead exposure for young children.
Lead solder was commonly used to join copper pipes until around 1986 when it was banned. As lead solder is in direct contact with copper pipe, lead could be released into the drinking water. Lead paint was banned for residential use in 1978. Homes built before this time may have lead-based paint and dust contaminated with lead-based paint.