The Water Replenishment District of Southern California (WRD), selected Tetra Tech to design the Ground Water Reliability Improvement Project (GRIP). Tetra Tech used multiple technologies to treat secondary effluent to a near distilled water quality and re-inject into the groundwater basin. The effluent will be treated at a higher level than drinking water with less impurities or constituents in the water, allowing for a high-quality groundwater recharge. Read more: http://bit.ly/2yEzull