A professional who analyzes samples of streams, raw and treated wastewater, sludge, and other byproducts of wastewater treatment process to determine efficiency of plant processes and to ensure that plant effluent meets water pollution control requirements, using standard laboratory equipment. Responsibilities include:

• Conducts tests for settleable solids, suspended solids, total solids, volatile solids, volatile acids, alkalinity, pH, dissolved oxygen demand, turbidity, and other substances.
• Initiates changes in laboratory procedures and equipment in order to increase efficiency of laboratory.
• Directs laboratory personnel in prescribed laboratory techniques and performance of routine tests.