Where does all the water go? According to the Environmental Protection Agency (EPA), in a typical wetland environment, 36% of the water is outflow; 47% is seepage; 6% evaporates; and 11% remains as water volume in the ecosystem (Reference: United States Environmental Protection Agency Case Studies Report 832-R-93-005). Chloride compounds as residuals from residential areas are a problem for wetlands. Suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 74.0; seepage, 73.4; remaining due to evaporation, 40.0; in the water volume, 46.8.