What's coming out of your tap? The Tapwater Tour is an exciting investigation of water quality examining the chemical properties of water directly from the tap. Each student on the Tapwater Tour completes several units while conducting his/her own water quality tests using safe, simple TestTab® reagent tablets. Students learn the relationships between good and poor water quality while examining the pH, chlorine, hardness, copper, and iron of water from the tap. Tablets and sample test bags for 50 students. Grades 4 to 8 / 50 Students. Shipped directly from supplier.