Hölscher Wasserbau

Hölscher Wasserbau is an independent, family-run German company specialising in interconnected solutions for groundwater management and water-related construction support. Founded in 1959 and headquartered in Haren (Ems), it has grown into one of Europe’s leading dewatering and groundwater specialists, with around 11 branch offices in Germany and several international subsidiaries and sister companies in countries including the Netherlands, Poland, Denmark, the U.K., Romania, Qatar, the Middle East and Canada. The group employs about 800 people worldwide, including more than 500 specialists, and works on roughly 800 to 1,000 projects per year. The company’s core business covers construction dewatering, groundwater control and management, well drilling and well systems for drinking, mineral, industrial and geothermal water, as well as environmental engineering, remediation and water treatment. Its portfolio includes horizontal drains, deep wells, wellpoint systems, vacuum filter systems, modular water treatment plants, landfill leachate and gas handling, and contaminated site cleanup, supported by automation, EI&C and PLC-based process control technologies. Hölscher Wasserbau also develops and applies specialised reinfiltration and infiltration methods such as the patented hw-dsi jet suction infiltration system, aiming to minimise disturbance of aquifers and to return treated groundwater to the subsurface in a controlled and sustainable way. Hölscher Wasserbau plays a significant role in large infrastructure and energy projects, providing groundwater management for tunnelling, rail and pipeline works such as Stuttgart 21, Munich’s second main line, the A2 Maastricht tunnel and major pipeline links. In Germany’s energy transition it manages groundwater for onshore sections of HVDC connections and grid expansion corridors that transport offshore wind power, lowering and treating groundwater to enable safe underground cable installation while protecting water resources. The company has set a target of becoming water-neutral by 2030.