Profile: WJ Groundwater Ltd specializes in offering groundwater contract services. We also provide groundwater control / dewatering, deepwell systems, ejector & wellpoint systems, well drilling and slope stability. Our ejector systems are able to extract groundwater and generate a high vacuum at the base of wells up to 50 m deep and as little as 50 mm in diameter. Our dewatering systems are used to control pore pressures and to lower groundwater levels to provide stable working conditions in excavations.