Students examine water quality in an aquatic environment with known or suspected pollution. Kit (item #652582) contains all information and equipment needed to set up a student-operated water pollution study. Includes 3 handbooks: A Study of Water Quality, Our Environment Battles Water Pollution, and Investigating Water Problems. Also includes enough materials to perform 50 tests for chlorine, pH, nitrate-nitrogen, phosphate, ammonia-nitrogen, dissolved oxygen, and temperature. Packaged in a field-friendly tote constructed of durable, waterproof fabric and a solid plastic bottom that keeps contents dry. Top handle, side handles, and shoulder strap make toting easy; and handy exterior pockets are perfect for notebooks, maps, and pens. Refill (item #652583) replenishes all consumable items for the kit.