Thomas Desalination Service was established in 1986. We are located in the beautiful Puget Sound region of Washington state. Our business was founded on selling and servicing marine watermakers. We have since become a full service water treatment company, having added residential and commercial reverse osmosis and softening equipment. Our knowledge and experience has helped make us a trusted partner, providing the right equipment and expert service for our customers. We are a member of the WQA - water quality association - and our founder, Dana Thomas is a WQA certified water specialist.