Onsite Wastewater Treatment and Reuse
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Advanced Pretreatment Components

Advanced wastewater treatment increases the percentage of contaminants, particularly nitrogen and fecal coliform, removed in wastewater. Advanced pretreatment components typically follow primary treatment from septic tanks and decrease the constituents of concern before they reach the final treatment and dispersal component. Advanced pretreatment components are used when a site has a high risk to public or environmental health and primary treatment is not protective enough. Advanced pretreatment components include:

• Media filters
• Aerobic treatment units (ATUs)
• Constructed wetlands
• Lagoons



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