About: http://webisa.webdatacommons.org/240389387

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	Water hardness is a term used to define the number of ions contained in the water, especially quantity sulphate, carbonate salts of calcium and magnesium.
http://www.w3.org/ns/prov#wasQuotedFrom	worldwidescience.org