The WGB32BM whole house filter is an ideal "point of entry" filtration system for well water. Unlike "point of use" RO systems that are installed to supply water to a specific faucet, the WGB32BM filters water from the source. This means water from every output in your home will have passed through the three filtration stages. The stage 1 housing holds a 5-micron high-capacity polypropylene sediment filter. This filter removes dirt and other various larger-sized particles from the water that can clog the following filters. The second stage of the WGB32BM houses a 5-micron CTO coconut shell carbon block filter. Block carbon is more effective than other forms of carbon in that it is finely ground up carbon packed into a solidified block. This means they have a higher density than other types of carbon filters and are therefore more effective in removing their targeted contaminants. The carbon block filter knocks out bad tastes and odors, removes over 90% of chlorine, and is effective on chemicals like pesticides, herbicides, and industrial chemicals. The third stage of the WGB32BM has an iron and manganese reducing filter - also great for the plethora of heavy metals found in well water sources.