Water supply and sanitary engineering are two crucial aspects of civil engineering that play a vital role in ensuring the health and well-being of communities. The availability of clean water and proper sanitation facilities are essential for human survival, and it is the responsibility of engineers to design and implement systems that provide these basic necessities. One of the prominent engineers who has made significant contributions to this field is S.C. Rangwala. His work on water supply and sanitary engineering has been widely recognized, and his book, available in PDF format, has become a valuable resource for students and professionals alike.