Mathew R. Garrett

Garratt-Callahan Co. provides custom water treatment solutions. It offers boiler water treatment, feed and control equipment, cooling water treatment, potable water treatment, custom wastewater, and chemical cleaning solutions; and Bioaugmentation, a bacteria-based solution that provides a safety-tested natural alternative for cleaning and maintaining drain lines, grease traps, and wastewater treatment systems that are afflicted with solids, foaming, odor problems. The company also provides water treatment programs and onsite training services; laboratory water, deposit, resin and corrosion analysis services. The company was founded by Edward C. Garratt and John Callahan in 1904 and is headquartered in Burlingame, CA.