Wastewater management Wastewater systems There are three common types of wastewater systems used to manage wastewater in the Barossa region Septic system maintenance tips Whatever septic system you've chosen, regular maintenance will be required, so we've put together some handy septic system maintenance tips! Onsite wastewater applications All waste control system installations must comply with the onsite wastewater systems code and can be submitted by the onsite-wastewater works application form. CWMS connection Properties in The Barossa Council may be serviced by the Community Wastewater Management System (CWMS) for wastewater removal and treatment.