This chapter deals with major public health item namely environment and health. Environment relation to health and components of physical environment are enumerated. Water as environment is dealt in detail. Public health chemistry, public health importance, water purification are discussed in detail. This is followed by discussion on air, ventilation, radiation and meteorology. House and town planning is separately dealt with. Under waste disposal, solid waste, liquid waste and sewage are covered. Chapter is concluded with human dead body disposal.