In 1996, the City of Chandler Industrial Process Waste Treatment Facility (IPWTF) began operating. As of January 1999, the facility had treated and recharged over 600 million gallons (2.3x1 O*9 L) of treated industrial waste water into local aquifers. The Chandler IPWTF accepts and treats industrial waste water born a nearby semiconductor manufacturing facility. This paper discusses the challenges this facility has faced since startup and how it has managed to overcome the effects of its diverse feed stream.