About: http://webisa.webdatacommons.org/450954928

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	I agree that cleaning may be an issue, especially as whatever chemicals may be used will end up in drinking water.
http://www.w3.org/ns/prov#wasQuotedFrom	wattsupwiththat.com