According to Kornit, the run off from industrial printing and textiles processes equals about 1,875,000 km³ each year. To put that into perspective, that output could fill up the entire Mediterranean Sea every two years.
Kornit printers utilise a 100% waterless printing process, without the need for pre-treatment, steaming, or washing. Aside from the water contained in the ink, there's no water used, whatsoever.