Abstract

A POTW’s Countywide Search for 50 Pounds of CECs
Track: Water, Wastewater, and Stormwater
Authors: Christopher Stacklin

Orange County Sanitation District has a service area of 479-square-miles with over 2.5 million residents. OCSD provides secondary effluent for the Groundwater Replenishment System, the largest indirect potable reuse plant in the world.
Recently, elevated levels of 1,4-dioxane were measured tributary to its facilities. While levels were below regulatory limits, OCSD launch an investigation. OCSD utilized an algorithmic approach to save resources while locating the sources of the discharge.