An artificial marsh has been constructed to treat surface water at a Magnolia, Arkansas production facility. The artificial marsh water treatment system utilizes aquatic plants and bacteria to treat up to one million gallons (4000 m3)per day of non-contact water and storm water runoff from within the main plant and adjacent areas. To protect the ecological balance of the marsh the cooling tower biocide was switched from an organic biocide to a program that uses sodium bromide. Sample analysis have demonstrated that the water quality exiting the marsh meets or exceeds permit requirements including bio-assay, The water, after removal of suspended solids by sand filtration is suitable for reuse as feed to the water softeners which supply water to the site steam boilers. By diverting this water into the plant, the amount of fresh well water required at the site and the amount of non-contact water exiting the facility has been reduced. Keywords: artificial marsh, biocide, sodium bromide, water reuse, recycle, zero discharge