title: Area screening--a new method of environmental health survey.
mesh_terms: D002140:California; D004782:Environmental Health; D006306:Health Surveys; D006801:Humans; D012037:Refuse Disposal; D012494:Sampling Studies; D012499:Sanitation; D012722:Sewage; D013551:Swimming Pools; D014881:Water Supply
chemical_list: D012722:Sewage