The book is designed to help the students to know the concept of environmental health, understanding the principles of hygiene in nursing, health and diseases etc. The present treatise has been produced in a simple style, so that even a mediocre student may very well understand the concept of environmental hygiene. The book includes total ten chapters with good amount of flowcharts, tables and illustrations for better understanding of health and disease prevention. The book describes the concept and principles of environmental health, demonstrate skills to apply the principles of environmental hygiene in caring for self and others and will describe the environmental health hazards, related health problems and the services available to meet them.