The aim of this study was to determine the possibility of using immersed membranes in removing arsenic from spiked tap water, through adsorption on precipitated iron hydroxide and subsequent filtration through immersed microfiltration membranes. Adsorption capacities of precipitated Fe(OH)3 were determined and compared with other adsorbents by calculating the adsorption isotherms, and the highest capacity was observed in precipitated Fe(OH)3. During filtration of precipitated Fe(OH)3 suspensions in demineralized water, critical fluxes were determined for a different suspended matter concentrations and mixing conditions. The highest value of 250 L/m2 h was achieved by filtrating suspension of 0.344 g Fe(III)/L and at airflow rate of 16.83 L/min. During a continuous experiment for 21 days in a reactor with an immersed membrane, tap water was spiked with 100 μg/L of As(V) and treated with 5.16 mg Fe(III)/L and the concentration of As(V) in treated water was always under 10 μg/L. The configuration of the membrane allowed the maintaining of a high permeate flux of 60 L/m2 h. Membrane fouling was mostly caused by the precipitation of scale on the membrane surface and into the membrane pores, which contributed 50% to the total resistance. Cake resistance contribution to total resistance was low and reached 15% at the end of the experiment when suspended matter in the reactor reached 8.85 g/L. The initial permeability of the membrane could be restored by chemical cleaning with oxalic acid.