Hence, specific water treatment processes are required to meet anticipated more severe water quality standards. A better understanding of currently available processes is necessary to develop economical, efficient and effective methods for arsenic removal. Arsenic can be coated, adsorbed using a wide range of mineral and organic or can be directly rejected by membrane processes such as reverse osmosis and nanofiltration. The recent development of submerged hybrid membrane systems, such as membrane bioreactors in wastewater treatment, provides alternative technologies for arsenic treatment.