@Chinenye Justin Nwaogwugwu ...
Published by Troy Davis, Project Advisor at Athlon Solutions
I am not trying to be sarcastic but isn't the best device for measuring taste the human tongue? If you know the contaminant causing bad taste (chlorine, sulfur, etc.) you could run analytical tests for each one, but taste is very subjective. Some people like having significant minerals in their water, while others prefer soft water.