Importance of water to the existence of human life is next to air. Human
settlements, towns and cities are dependent upon the continuous supply of water
from different sources. Water exists in all the three formsâ€"solid, liquid and
gasâ€"and all the three forms are important to humans as well as all the
biological systems. This edition discusses importance, properties and uses of
water, along with quality, sources and classification. Conveyance of water,
quality, and waste-water treatment are the topics focussed upon. Besides
filtration, both physical and chemical operations have been discussed
thoroughly. Water transmission and distribution systems have been discussed.
Biological waste treatment, residual management, treatment of