Market-leading microscreen filters Hydrotech develops and manufactures high-performance microscreen filters for suspended solids removal. The mechanical, self-cleaning filters use a combination of high-quality materials and patented processes, resulting in a product that no other filter on the market can match. Hydrotech filters are high-quality products with proven performance, minimum maintenance, and the best economic value. A part of Veolia Water Technologies Hydrotech is a part of Veolia Water Technologies. With a local presence and a worldwide network of experts, Veolia Water Technologies provides a complete range of services required to design, build, maintain and upgrade water and wastewater treatment facilities for industrial clients and public authorities.