Profile: Hydro International offers environmentally sustainable products and innovative solutions for the control and treatment of stormwater and wastewater. Our Downstream Defender® is an advanced hydrodynamic vortex separator that is designed to remove sediment, floatables and associated pollutants from stormwater runoff. Our Super-Flo™ is a modular concrete stormwater storage and discharge system incorporating a combination of features to reduce storage and maintenance requirements. Our Grit Classifier™ is a grit dewatering and classification device that provides consistent grit quality with a low residual fecal organic matter.