Tennant Company’s ec-H2O technology is a category changing advancement for the cleaning industry that reduces water use, eliminates toxic chemicals, improves the health & safety of workers, and offers a lower cost-of-use. ec-H2O creates significant reduction of water usage as well as eliminates the emission of chemical waste into the water system. Tennant Company’s ec-H2O eliminates the need to add a chemical detergent to the cleaning process by electrically activating normal tap water to perform like a traditional detergent. http://www.tennantco.com/na-en/products/machines/t5-scrubber.aspx