Nitrate, ammonium and/or dissolved reactive phosphorus load in drainage water from farms can be managed by reactive or biological media filters. Obtaining the nutrient content of the drainage water via water analysis focuses attention on filter media selection. 

FarMit allows choice for 5 nutrient scenarios with a database containing 75 media with an associated static scoring system across seven criteria (% of nutrient concentration reduction, removal of other pollutants, lifetime, hydraulic conductivity, negative externalities) and a dynamic scoring system across two criteria (delivery cost and availability). The DST was tested using case studies from Ireland, Belgium and USA with different agricultural practices and nutrient scenarios, and validated by SWOT (strength, weakness, opportunities and threats) analysis. The DST provides a rapid, easily modifiable screening of many media-based treatments for specific dual or single nutrient-based water drainage problems.