What a great sustainability initiative. One thing to consider is you are probably pumping a bunch of PFAS (polyfluoroalkyl substances) into the ground water. It is one of the most common and harmful byproducts of clothing material. So in this sysytem just make sure you are washing clothes that are made of natural matierials like cotton/wool/bamboo. Synthetic clothing materials like polyester contain these "forever chemicals."

More info here from EPA: https://www.epa.gov/pfas/pfas-explained