I am looking specifically for information regarding Ag water re-use. Meaning how the law and regulations impact the recovery, treatment, and re-application of water from farm operations. I realize that recovering irrigation water from some shallow depth will affect the amount of water reaching aquifers at depth. How is this activity monitored and regulated? What are the treatment requirements? Removal of chemicals including pesticides, fertizers, salt, pharmaceuticals, plant hormones and biologically active residues, as well as pharmaceuticals….. not to mention pollutants generally…. before returning to the irrigation stream….