About: http://webisa.webdatacommons.org/434438583

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	However no filtration can remove substances that are actually dissolved in the water such as phosphorus, nitrates and heavy metal ions.
http://www.w3.org/ns/prov#wasQuotedFrom	schools-wikipedia.org