Modern Water plc is a United Kingdom-based holding company. The principal activities are to own, develop and supply technologies, products and services related to the provision of fresh water and treatment and disposal of waste water, specifically for the design, construction, testing, installation, commissioning and operation of desalination plants, water cooling systems and brine concentration plants; packaged seawater desalination systems; wastewater treatment systems, and water quality monitoring, environmental monitoring and soil testing. It operates through two segments: membranes and monitoring. The Membrane Division includes thermal desalination, membrane brine concentration, evaporative cooling systems, packaged seawater reverse osmosis (SWRO) desalination systems and wastewater treatment. Its Monitoring Division includes trace metal products, toxicity products and environmental products.