Currently, EDTA titrations are among the most commonly used techniques to quantify water hardness. This method relies on precise volumetric measurements and a lot of human intervention, which slows down the procedure and limits efficiency. For this experiment we measured the calcium and magnesium concentrations by using a fast and efficient instrumental technique to eliminate these concerns, flame atomic absorbance spectroscopy (AA). AA is a powerful instrument which measures the concentration of individual elements in a sample. The sample is introduced to an open flame that breaks everything into its basic atomic components. Light with a specific wavelength that is able to be absorbed by the atom of interest is sent through the sample and its absorbance is measured and quantified. AA is simple to operate and generates data very quickly and accurately with minimal intervention.