Polycyclic aromatic hydrocarbons (PAHs) are potential atmospheric pollutants comprising of used aromatic rings and do not have substituent or heteroatoms. They are found in coal, oil and deposits of tar and are byproducts of both biomass and fossil fuel burning. They are of great concern when they are pollutants. This is because they easily mix with oil as opposed to water, which explains their natural occurrence in the oil. Deposits of natural crude oils contain significant quantities of PAH’s that crop up when natural molecules are converted chemically to aromatic hydrocarbons (Review of environmental consequences of BP Deepwater horizon… 3). PAHs are therefore harmful to human health and plants. Different compounds of PAH’s have different effects to these organisms. As a result, when BP oil spill occurred there was an increased concern that PAH’s might destroy seafood and plants in the Gulf of Mexico. Previous oil spills such as Exxon Valdez in the coast of Alaska left marks of environment impact like oil puddles, which still exists in the Prince William Sound. In addition, oil spills can also be traced in Panama water of Bahia Las Minas some 25 years later. The quantities of the oil spilled by these accidents into the ocean are insignificant compared to the number of gallons that BP spill in the Gulf of Mexico, jetting into the ocean every day from April 20 2010 and lasting for over three months. This therefore means that its impacts will be enormous and it is unknown how long it will last. This paper explores the likely impacts projected to be caused by the oil spills because of its PAH’s compounds, as well as what has been observed so far. Background Within a week, Transoceanic oil spill had been reported to cause a spill of 250 000 barrel of oil into the ocean, making the president of United States to declare it a national disaster. Technical fault in the Macondo have been blamed for the eruption of fire in the rig that caused the spill into Deepwater Horizon of Transocean. Since the fire continued for almost three months, significant oil spills continued to flow into the ocean (BP 14). Unknown quantity of crude oil was released into the Gulf of Mexico from a 5,000 ft depth in Mississippi gorge. As a result, different ecosystems in the Gulf basin were subjected to unknown negative effects due to the quantity of oil released. However, the effects on natural resources depend on a number of factors including quantity of oil, composition and organism contact. These impacts may be in the offshore, on mid-level mixing layer, as well as at the sea floor. On the other hand, onshore impacts may take place on shorelines, coastal habitats and near shore. To reduce the impact of oil on different ecosystems, dispersants are used to change its chemical and physical composition, and thus transform its transportability, potential effects and fate. The choice to use dispersant is arrived at because oil is generally dispersed through wind and waves actions. As a result, dispersants help to increase the quantity of oil that physically combines with the water column. This reduces the slick potential contamination of shoreline habitats and fauna or effects on l