Boil to 100 degrees (boiling point of water), if it doesn't evaporate/boil at 100 degrees it is not pure. Also if it is pure when all the water has evaporated nothing will be left over. E.g. Sea water --> salt would be left behind
How To Test If Bottled Water Is More Pure Than Tap Water?
Test the water for purity is very expensive. First you have to see is the water clear or discoloured. Check the smell of water.
For detailed information on how to check the purity of water, kindly visit the following link.
www.ehow.com
For detailed information on how to check the purity of water, kindly visit the following link.
www.ehow.com
These tests has to be performed by a laboratory. Impurifications may origin from inorganic, organic and/or microbiological material.