Are there harmful effects of water softener discharges on household septic tanks?

According to the Water Quality Association (WQA), water softener regeneration discharges do not pose a problem to septic systems or to the leach field. Studies have shown that water softener regeneration wastes not only do not interfere with the septic tank system drain field soil percolation, but, actually could improve soil percolation, particularly in fine-textured soils.