The point-of-entry arsenic removal system from Aquatic Treatment Systems Inc. treats all water used in the home. Requiring 3 square feet of space, the modular system is designed with flexibility for additional treatment options. The system removes arsenic III and arsenic V to less than two parts per billion; its ATS adsorption and oxidation media are certified according to NSF/ANSI Standard 61. Aquatic Treatment Systems Inc., Card No. 252