Polycyclic aromatic hydrocarbons (PAHs) in aquatic environments are a priority concern due to their carcinogenic and teratogenic properties, bioaccumulation, and long-range transport. PAHs emanate from partial burning of various sources like coal, oil, and natural processes like forest fires. Due to adverse effects of PAHs, it is essential to detect and eliminate PAHs from water using reliable techniques. A variety of physical, chemical and biological methods for treating PAHs contaminated water have been investigated. Physical methods including adsorption and membrane filtration have excellent removal performance and considered to be the best method for PAHs remediation due to their ease of operation, affordability, safety and universal nature. Therefore, physical treatments are frequently used as a pre-treatment step prior to applying advanced technologies. This chapter investigated the presence of low molecular weight PAHs in aquatic environments, their adverse effects on organisms, and their treatment using physical methods.