We're on a septic system and some of my grey water is diverted straight to the drain field. The drain field runs under our garden and back lawns and flower beds. Takes less watering to keep everything back there green.
If you garden and have a deer or rabbit problem and want to get rid of the pests. Get hubby to urinate into a container and then pour the collected urine on your flower beds and garden bed edges. The deer will not come anywhere near your garden any more. I KNOW it works.