A professional who designs and directs construction and operation of hygienic projects such as waterworks, sewage, garbage and trash disposal plants, drainage systems, and insect and rodent control projects. Responsibilities include:

• Plans development of watersheds and directs building of aqueducts, filtration plants, and storage and distribution systems for water supply.
• Directs swamp drainage, insect spraying, and design of insect-proof buildings.
• Plans and directs workers in building and operation of sewage-disposal plants.
• Designs and controls operation of incinerators, sanitary fills, and garbage-reduction plants to dispose of garbage and other refuse.
• Advises industrial plants in disposal of obnoxious gases, oils, greases, and other chemicals.
• Inspects and regulates sanitary condition of public places, such as markets, parks, and camps.
• May plan and direct operation of water treatment plant to soften and purify water for human consumption or industrial use and be known as Water-Treatment-Plant Engineer.