Water Treatment Design Course - Self-Study


The Water Treatment Design Course is a self-paced training opportunity for technical in-office staff, technical support staff, engineers and others to learn about water contaminants and treatment solutions. The course addresses contamination behavior, drinking water regulations, POU/POE treatment technologies and their application and sizing. 

The course is a pre-requisite for the Certified Treatment Designer title. 

The first three of four modules may also be completed as instructor-led courses in the CWS program. Please check the Education page at wqa.org for upcoming classes and make sure to select the CTD-path options when registering. 

Topics covered:

  • Introduction to Water Contaminants & Treatment
    • Source of contaminants in water
    • Surface water and groundwater characteristics
    • Overview of types of contaminants and their effects
    • Drinking water regulations
    • Overview of common in-home treatment options
    • Treatment product certification overview
    • Advertising guidelines in the WQA Code of Ethics
  • Applied Water Chemistry
    • Atoms, ions, molecules
    • TDS vs TSS
    • Overview of behavior of contaminant types in water: microbiological, organics, gasses, inorganics
    • pH
    • Reduction/oxidation
    • Influence of contact time on reactions
  • Behavior of aesthetic water contaminants
  • Behavior of drinking water contaminants
  • Emerging contaminants
  • Premise plumbing concepts, including peak flow rates
  • Pipe sizing, pressure loss, cross-connections & backflow prevention
  • Treatment options
    • POE Ion exchange
    • POE Oxidizing media
    • Aeration
    • POU/POE Sediment media
    • POU/POE Activated carbon
    • POU Reverse Osmosis
    • pH Adjustment
  • Treatment sizing
    • Media capacity
    • RO production rates and driving pressure
    • Tank sizing for media flowrate/backwashing requirements
    • Mixed bed vs. multiple tanks
    • Sizing for contact time
  • Multiple tank control schemes
  • Disinfection
    • Chlorination/chloramination
    • UV radiation
    • Ozonation
    • Filtration
    • Injection pump sizing