Appropriate for Grades 6-12 Test up to 4 different water sources Testing drinking water couldn't be easier! This comprehensive Watersafe (R) kit contains enough testing materials to compare the water quality of up to 4 different water sources, with results on the spot. You can test for lead, bacteria, pesticides, nitrates, nitrites, chlorine, hardness and pH. The kit comes with a data sheet and a list of suggested projects.