a drain pipe or sewage or sewage discharges waste water into a river. wastewater or domestic wastewater or municipal wastewater

activated aroma biological cigarettes city collector combined community defect discharges domestic drain drainage drains duct ecology effect environment gutter healing housing microorganisms municipal nature outdoor people pipe pipes plants plastic pollutants pollution polyethylene product river sewage sewer sludge smell spoiled storm that tobacco treat treatment ulcerated waste wastewater water