Studies done in the 1970’s at the University of Wisconsin concluded that salt-brine discharge from water softeners had no ill effects on the operation of typical anaerobic or newer style aerobic home treatment systems. It was also confirmed that water softener regeneration discharge did not hurt drain field soil percolation and in some cases could improve soil percolation. Septic tank effluents containing water softener effluents include substantial amounts of calcium and magnesium, which balance the effect of sodium, in addition to promoting and sustaining soil permeability. According to the study results, it is preferable to discharge water softener waste to septic systems than to separate dry wells or ditches. Learn more at www.wqa.org.