ABSTRACT

Because wetland systems are constructed using local labor and local materials, it is not possible to offer precise universal cost estimates that will apply to all treatment systems. Generally, the basic components of a wetland treatment system-earthwork, gravel (in the case of SSF wetlands), liners, and plants-are produced in regional markets that are distance sensitive. For instance, the installed cost per cubic meter of gravel is highly dependent on the distance between the source of supply (a local gravel pit) and the site of wetland construction. Labor costs are also highly variable. To assess the feasibility of a wetland treatment system, local cost figures should be used to compare the capital and operating costs of a wetland system against that of other treatment technologies.