About: http://webisa.webdatacommons.org/376293556

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	Chemical contaminants can come from sources such as agricultural runoff, industrial activities, and atmospheric deposition of airborne pollutants.
http://www.w3.org/ns/prov#wasQuotedFrom	epa.gov