ResidentialÃÛ´½Ö±²¥apps are sustainable septic systems that provide a permanent combination of biological treatment and physical filtration of wastewater not matched by any other treatment technology. CommercialÃÛ´½Ö±²¥app has extensive experience treating commercial, high-strength, and light industrial wastewaters onsite. Communal & SubdivisionCommunal or clustered decentralized wastewater treatment is a reliable and cost-effective alternative to individual septic systems or the expansion of city sewer mains out to rural subdivisions. Nutrient RemovalÃÛ´½Ö±²¥apps help to reduce environmental risks by removing a large portion of total nitrogen and total phosphorus from incoming sewage before any water is released back to the environment.