PurTest Iron Hardness Plus is a do-it-yourself test kit; EPA based instant water tests allow you to test for 8 different drinking water contaminants. Tests for iron, hardness, copper, chlorine, pH, alkalinity, nitrates and nitrites. Two (2) tests each. Easy, reliable, fast, accurate, and convenient. Results right -at-home. Nothing to mail, consumer friendly and environmentally conscious, there is nothing toxic in PurTest. Know what problems exist in your water supply before purchasing water treatment equipment. Performance of water treatment equipment and filters should be monitored. Test with PurTest to make sure your equipment is working properly.