The Island County Housing Authority in Washington State required a Large Onsite Sewage System (LOSS) for a new low-income housing development. In partnership with 2020 Engineering, Aqua Nova designed an innovative wastewater treatment system that was contained within a large, buried HDPE tank. The System uses a four-stage MBBR (moving bed biofilm reactor) that provides nitrogen removal to protect groundwater from nitrate increases. Effluent is filtered and se

treatment system. The system was commissioned in 2015.