Sandusky Bay, a shallow bay in Lake Erie, typically experiences harmful algal blooms (HABs) every year, which impact animal and human health. To control these HABs, nutrient trends in the bay must be understood. The goal was to determine how nitrogen and phosphorus vary across time and location in Sandusky Bay. Levels of nitrogen and phosphorus in the water were measured at multiple time points and locations over three summers (2017-2019). Samples were processed, and graphs were constructed using Excel, R, and RStudio. For both N and P, the nutrient concentrations declined in a West-to-East fashion. N concentrations decreased throughout the season, while P was more variable. This indicates that these nutrients are up-taken and/or released by something else, such as sediment or algae.