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[[File:constructed wetlands.jpg|center|170px|link=Constructed Wetlands]]<br/>[[Constructed_Wetlands|Constructed Wetlands]]
| For septic tank or primary treated effluent. Sites with no power, where land is plentiful. Useful where soils are shallow, unlike lagoons that require greater depth<br/>
| Moderate - The media, typically crushed stone and liner material are significant cost items<br/>
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[[File:Cocopeat1.jpg|center|170px|link=Cocopeat Filters]]<br/>[[Cocopeat_Filters|Cocopeat Filters]]
| Cocopeat, sand and gravel can be used as filtration media for secondary treatment. Used as intermittent flow or recirculating filters. Use these systems where local materials are available<br/>
| Low - When locally available materials can be used for the filter media
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[[File:Oxidationditch.png|center|170px|link=Technology]]<br/>[[Technology|Aerobic Systems]]
| For sites where power is available and land area for wastewater is limited and expensive
| Variable – Cost per cubic meter of treatment drops as size of the systems increase. For very large systems, the cost per cubic meter treated can be very low
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[[File:RBC.png|center|170px|link=Rotating Biological Contactors]]<br>[[Rotating_Biological_Contactors|Rotating Biological Contactors]]
| Requires electricity. Generally used for small to medium-sized residential or commercial sources. Useful when land area for wastewater treatment is limited
| High - Manufactured and electrical components generally not locally available except in largest municipal centers
