Objective: Determine what effect agricultural runoff has on the surrounding environment and find what solutions can be adopted to reverse any damage. Introduction: There are many different species of algae. One of the most common algae, blue-green algae, is a type of cyanobacteria. One species of this is Chlorella regularis, a unicellular algae that stays alive through the process of photosynthesis. Algae growth depends on a variety of factors, such as the nutrients present in that environment, temperature, light levels, turbidity and stable conditions. (Department of Primary Industries, 2009). The mass growth of algae is known as an algal bloom. This large population has negative effects on the surrounding environment. Algal blooms have been linked to diffuse pollution from agricultural runoff in studies conducted at Stanford University in 2005 (Stanford Report, 2005), with the high levels of nitrogen/phosphorus used in spreading fertilizers to these water sources , increasing algae levels. Nitrogen, for example, helps the chlorophyll of algae to photosynthesize at a faster rate, causing them to reproduce at a faster rate (Douma, 2008). Algal blooms are not a new event, the first occurring in the world in 1878 in South Australia. In recent years, the number of these algal blooms has increased, with much larger areas than ever before filled with these blooms. Research by the Smithsonian Institute found that in some areas, water could go for years without any contamination, but within days of agricultural runoff reaching the ecosystem, high levels of algal blooms were detected. Common fertilizers contain high levels of phosphorus and nitrogen, which is what a plant needs to produce more... half paper... for drinking water, this would lead to water contamination. It is not yet clear whether this solution can bring any benefits or not. Algal blooms represent a huge environmental risk, with mass outbreaks devastating for many stakeholders. In late 1991, an infamous boom colored 1,000km of the Darling-Barwon river system, resulting in the deaths of 1,600 sheep. This ultimately led to a surge in research into these cyanobacterial blooms, which helped develop some types of prevention methods. (Avolio, 2013). It may take months for a few days' worth of damage to be repaired, with some standing water sources taking even longer to repair, as the same water is in exactly the same location. Assumption: The solutions will not fully restore the environment to an adequate state and will not be able to accurately reverse the damage resulting from pollution.