Sterner is a leading company in Water Treatment Technology. We operate in the markets of Aquaculture, Drinking Water, Waste Water and Maritime. We deliver process components, complete systems and turn key facilities in water treatment within our markets. Nobody owns the water, it is a resource we all share. We simply borrow it, and we have to deilver it back to nature as clean as it was when we borrowed it. Sterner’s vision is to make this possible!