The Marine Corps Air Ground Combat Center (MCAGCC) in Twentynine Palms, California, is the largest air/ground combat center for the U.S. Marine Corps, occupying approximately 1,100 square miles of the Southern Mojave Desert. The existing wastewater treatment plant (WWTP) operates on a lagoon system where the effluent is used for irrigation water at the Desert Winds Combat Center Golf Course. The new plant will decommission the existing 0.75 million gallon per day (MGD) average daily flow wastewater treatment process without disruption to existing plant operations; and will replace it with a new 2-MGD system that produces California Code of Regulations Title 22-compliant disinfected tertiary recycled water. The new facility will treat to higher standards than the existing facilities and increase the volume of recovered water, enabling increased reuse of reclaimed water for irrigation throughout the base and support MCAGCC’s mission by reducing the consumption of nonrenewable groundwater.