Health - Is the state of complete  physical, mental and social well-being and not merely the absence of disease or infirmity.

Public Health is a science and art of preventing disease, prolonging life and promoting physical and mental health and efficiency through organized community efforts for:

•          Sanitation of the environment;

•          Control of communicable infections;

•          The education of the individual in principles of personal hygiene

•          The organization of medical and nursing services for the early diagnosis and treatment of disease; and;

Development of the social machinery which will ensure to every individual in the community a standard of living adequate for the maintenance of health

Public Health Survey is the analysis of the prevailing conditions, actual and potential, in an area and the forces producing those conditions which exist or may exert a favorable influence on the health of the inhabitants.

Environmental Health

•          the total relationship of man to his physical, biological, socio-economic and socio-cultural environment as it affects human well-being

•          Characteristics of health that result from the aggregate impact of both natural and man-made surroundings, including health effects of air pollution, water pollution, noise pollution, solid waste disposal, and housing; occupational disease and injuries; and those diseases related to unsanitary surroundings.

Public Health Engineering

•          Public Health Engineering deals essentially with the control of the environment, with those modifications and protective and preventive measures that have been found desirable or necessary for providing  optimum conditions for health and well-being.

•          It is synonymous  with Environmental Sanitation and represents the practical  application of sanitary science.

Environmental Sanitation

•          the science dealing with the prevention and control of diseases by eliminating or controlling the environmental factors which may form links in disease transmission.

•          the control of all factors in man’s physical environment that have significant effect on man’s physical development, health and survival.

The most common environmental factors which the Sanitary Engineers concern that may form links in the disease transmission

•          Water

•          Food supplies

•          Wastes

•          Insects

•          Housing

•          Public places

•          Others

•          The concept and theories in the location in the location, planning, design, construction, operation, maintenance and treatment of municipal and rural water supply system.

•          Sewage and waste disposal

•          Specification and features of pit privies septic tank treatment

•          Drainage and solid waste disposal

•          Emergency Housing

 https://onlinelibrary.wiley.com/doi/abs/10.1002/ncr.4110170411

https://www.amazon.com/Municipal-sanitation-sanitary-resources-engineering/dp/B0000CMI3H