In conclusion, the results from this experiment were reasonable. The hardness of a water sample was successfully discovered by finding the calcium content in the sample. The calcium content from the three trials performed were 210.3 ppm, 200.3 ppm, and 200.7 ppm. The average of these three trials with standard deviation was 203.8 ± 5.66 ppm. This showed that the water fell into the range of numbers indicating hard water.