Soil aquifer treatment (SAT) is a natural water treatment process that involves the infiltration of wastewater or stormwater through soil and into an underlying aquifer. This process allows for the removal of contaminants through physical, chemical, and biological processes in the soil and aquifer media. SAT is commonly used for treating wastewater and stormwater to improve water quality and recharge groundwater supplies. This method is considered a sustainable and cost-effective approach for water treatment and groundwater recharge.