Anionic surfactants one of the most common surfactants use behavior in household, especially linear alkylbenzene sulfonate (LAS) Therefore, this research aims to study the LAS removal efficiency of the grass filtration system and constructed wetland that using to treat Peth community wastewater of LERD the results were revealed that water samples in wet and dry period and sampling points along the distard of plot, all of plot of the grass filtration system and constructed wetland the concentration of LAS in influents were more than in effluents. Therefore, these treatment system had no sufficient efficiency to treat LAS because of the long chain of hydrocarbon and the shorten time for microbial digestion process