THE disposal of industrial process wastes creates a wide variety of problems involving one of our most valuable natural resources, namely, water. Uncontrolled waste discharges have 'the capacity of substantially impairing and often destroying natural stream values. Correction of abuses in waste disposal is the prerequisite to the most constructive use and maximum development of surface waters. It is not surprising, therefore, that industrial waste treatment occupies a key place in water policy administration. The many sources of industrial waste problems and the conflicts and injuries which they encompass are presumed to be known to the sanitary engineer and industrial hygienist. However, there exists a broader basis than this for a mutual interest in the subject by the two professions. The industrial hygiene engineer will frequently encounter problems involving waste disposal in his industrial contacts. Plants utilizing oil, acid, cyanide and caustic compounds present both occupational and pollution hazards. His knqwledge of production practices gained in conducting surveys of industry can be valuable when relayed to the sanitary engineer engaged in obtaining improved waste disposal. Adoption of control measures by industry to meet the requirements of