I have a system like you are talking about that I used for all water needs until the water company ran lines to my rural area. It is still in operation however I now have "city water" and only use my lake system for outside water needs. The system consists of a standard well pump that is run into the lake about 5 feet below the surface in 10 feet of water. The water goes into a standard well pressure tank and then into a series of tanks. When the pump runs a small tank supplied alum to the water, then another infuses chlorine. The water goes first into one 150 gallon settling tank, then into another. The chlorine kills the bacteria then alum settles out the dirt. The water then goes into a 60 gallon sand filter and then a 60 gallon charcoal filter. What comes out is clean clear water. When I built the house I priced out a well system and then this system. This system was about half of what a well would have cost. In our area Culigan water does this as well as several plumbing companies.
