Globally, there is an imbalance between water availability and water demand. The main cause of this mismatch is agricultural irrigation, which accounts for about 70% of freshwater withdrawal. At the same time, wastewater treatment plants discharge large volumes of water that diminish the quality of the limited freshwater resources. A new study by a diverse team of experts, including researchers from the University of Amsterdam, shows that reusing treated domestic wastewater through groundwater fed irrigation can satisfy part of the agricultural water demand, while wastewater is naturally purified through the sub-soil. Their findings are now published in the scientific journals Science of the Total Environment and Reviews of Environmental Contamination and Toxicology.