Sanitation n. : The act of rendering sanitary; the science of sanitary conditions; the preservation of health; the use of sanitary measures; hygiene.

Example:
What was Sanitation like in British cities during the Industrial Revolution?

Taxonomy
Sanitation, wastewater, wastewater treatment, Ecological sanitation, sewers, food industry, equipment, developed countries, target, developing countries, open defecation, waste, sanitation systems, hygiene, rural sanitation, free encyclopedia, solid wastes, treatment.

Defination from the web:
Sanitation is the hygienic means of promoting health through prevention of human contact with the hazards of wastes. ... This terminology is the indicator used to describe the target of the Millennium Development Goal on sanitation. ...