The authors constructed an experimental setup for contact elimination of iron from groundwater with a bioreactor and a polystyrene foam filter at an agricultural enterprise to ensure a regulatory content of iron in potable water. A method to calculate structural and technological parameters for filters to ensure minimum capital and operating costs under the regulatory quality indicators for purified water was developed. Based on experimental research, the relationship between the speed of water filtering and the duration of filtering, as well as between the speed of water filtering and filter charging (and hence, the duration of the useful work of the filter) were defined. The efficiency of deferrization and pressure loss across the filter in relation to the specific contaminant capacity of the filter and the filtration rate were studied. The minimum specific contaminant capacity of the filter for the experimental setup was determined.