Water integration in Eco-Industrial Parks can help save freshwater by reusing wastewater from different industries. Mixing wastewater is not ideal because each source has different contaminants. By separating and treating wastewater, industries can reuse water generated as by-products, from cleaning operations, and utilities. Technologies like membranes can remove harmful compounds, making treated wastewater a viable alternative water source. This approach can reduce water stress and the burden of treatment.