
Company A is an innovative British cleantech company, specialising in sustainable wastewater management and water purification solutions. Founded to address the global water crisis, the company develops and deploys proprietary, low-temperature, ambient-pressure technology that enables highly efficient treatment of industrial wastewater and other challenging effluents.
Their breakthrough patented approach harnesses low-grade waste heat (often from industrial processes or renewable sources) to achieve near-complete water recovery, advanced removal of micropollutants, nutrients, and contaminants, while minimising energy consumption, chemical use, and operational costs.
This results in recovered water suitable for reuse, discharge, or further processing – delivering environmental compliance, resource recovery (e.g., valuable concentrates), and significant cost savings compared to conventional methods.
Their systems are scalable, modular, and designed for “Water as a Service” models, making them ideal for industrial applications in sectors such as pharmaceuticals, food & beverage, chemicals, and waste management. They already have client sites in operation from Wales to China and have achieved £7.5 million revenue to date.
This is an EIS qualifying raise for HNW and SI investors only with a minimum entry level of £25,000.
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Company B addresses two of the biggest challenges in sustaining human life on earth – water and energy. Its patented solution has been described as the biggest step forward in water treatment in 50 years and has the potential to benefit every corner of the globe – from wastewater clean-up, water re-use, brine minimisation, ultrapure water (UPW) production, Zero Liquid Discharge (ZLD) and high-value mineral extraction to rural drinking water supply.
Over the next 25 years, the amount of energy used by the global water sector is projected to double. The supply, distribution and treatment of water will account for 4% of the world’s total electricity consumption. And for at least the next decade the majority of this energy will be generated from non-renewable sources such as gas and coal.
Company B has developed a disruptive technology to dramatically reduce the high carbon footprint of water treatment. Their compact, high recovery reverse osmosis and nanofiltrations systems dramatically reduce the energy footprint in a wide variety of industrial and municipal processes.
This company is raising £5 million on their Series A round.

This company uses a network of sensors to monitor water usage to a fine level of granularity, identify when filters need replacement and to localise leaks so their impact can be minimised.
The technology measures water flow, cycle, temperature, water pressure, CO2 pressure and conductivity at any water usage point.
Clients can monitor and control water usage across their entire operations using an intuitive dashboard providing analytics, alarms and a seamless API integration. This level of control protects your assets, makes maintenance easier and provides water and energy savings.
The technology is effective in a wide variety of installations including factories, offices, shopping centres, schools and hospitals.
Water Investment Network
124 City Road, London EC1V 2NX