Some of the best-reviewed water filters on Amazon.com include the APEC ROES-50 and the Culligan HF-360A. Of the two, the APEC has more positive reviews and a longer list of features.
The APEC ROES-50 is an under-sink water filter qualified for use with well water. It apparently removes 99 percent of contaminants, including chlorine, arsenic, lead, heavy metals and fluoride. It also removes bacteria and virus cells from water using a five-stage reverse osmosis system. The first stage removes sediment such as dust particles and rust, the second and third remove chlorine and similar contaminants, and the fourth stage uses reverse osmosis to remove a large number of chemical contaminants. The fifth stage removes any residual contaminants.
The Culligan HF-360A is a whole-house water filter rated for use with well water. It is specifically designed to extend the life of washing machines, water heaters and other household appliances by reducing the amount of dirt, sand, rust and silt particles present in the water. The device features a shutoff valve in its cap, allowing for simple cartridge replacement. It comes with a five-year warranty, accepts a wide variety of water filter cartridges and is significantly less expensive than the APEX ROES-50.