Well water filtration systems for the problems private wells actually have: iron and sulfur filters, water softeners built for wells, sediment and turbidity filters, acid neutralizers, UV for bacteria and reverse osmosis for arsenic and nitrates, on Clack and Fleck valves with a 5-year valve and 10-year tank warranty. Free shipping, 120-day returns, no sales tax outside Minnesota. Start with your symptoms or your test results: the guide below tells you which system fixes what, and in what order.