About: http://webisa.webdatacommons.org/178249220

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	These devices use various types of filtering media, including carbon, ion exchange resins, activated alumina and other privately marketed products.
http://www.w3.org/ns/prov#wasQuotedFrom	epa.gov