About: http://webisa.webdatacommons.org/199087089

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Corrosion or wearing away of lead-based materials can add lead to tap water, especially if water sits for a long time in the pipes before use.
http://www.w3.org/ns/prov#wasQuotedFrom	state.ma.us