Two important environmental parameters could be identified as being the main causes of pipe borne water contamination are the combined effects of rainfall and excessive construction work and, secondly, the lack or inadequacy of plumbing codes. To study the combined effects of rainfall and excessive construction on the contamination of water, a detailed research was made to know the different types of water, the meaning of pipe borne water, causes of water contamination and the possible solutions to prevent water contamination. At the end of this study, a valid conclusion was made. Hence, in this work we have compared two common elements, calcium and magnesium that are present in well and borehole water. The comparison was made in order to ascertain the different kind of benefits that both elements can offer to human. The differences and similarities between both elements were discussed extensively.