References
1. IS 3025 (Part 21) -2009: Method of Sampling and Test (Physical and Chemical) for Water and Wastewater,
Hardness, Second Revision.
2. IS 10500:2012- Drinking Water- Specification, Second Revision.
3. American Public Health Association et al, Standard Methods for the Examinations of Water and Waste Water,
APHA. 1998.
4. Sawyer, C. N., McCarty, P. L., and Parkin, G. F. 2000. Chemistry for Environmental Engineering. Fourth
Edition, McGraw-Hill, Inc., New York.