Manningham's Healthy Waterways Waterwatch Health Report

2. Waterway EcologyUn-sewered ManninghamApproximately 4,620 properties inManningham are not connected to areticulated sewer. These propertiesutilise septic tanks and greywatersystems to treat domestic wastewater.Normally a septic tank treats anddisposes of all household wastewater,however, many unsewered propertiesin Manningham have a split greywater/septic system. These systemsdischarge untreated householdgreywater from the laundry, kitchen andbathrooms into the local stormwatersystem which then discharges thishighly polluted water directly into ourlocal creeks. Septic tanks that arepoorly maintained (if at all) result in thedischarge of effluent to localstormwater systems and waterways.Mullum Mullum Creek algae bloomUn-sewered Propertiesof ManninghamStormwater discharge, Ruffey CreekManningham SewerBacklog ProgramWater testing Mullum Mullum CreekMap shows locations to be sewered over the next decade.Waterwatch 2013 Annual Report