Water PNG Ltd maintains Sewerage Systems in 7 Business Centres out of the 20 provincial towns. These towns are Lae, Mt Hagen, Madang, Popondetta, Kimbe, Alotau and Kundiawa.

Sewerage Treatment Plants treats the sewage or used water from the towns. It comes from domestic, commercial and industrial sources.The collection, treatment and disposal of sewage is an integral part of Water PNG operations.  Sewage is 99.97% water because by far the greatest volume comes from toilets and showers. The rest is dissolved and suspended matter. Sewage also comes from industrial processes.These 99.97% water and the solid component must undergo a treatment process so that when finally disposed, it is not harmful to the natural ecosystem.

 

 

Water PNG Wastewater Systems

Location of Watewater System	Wastewater Collection System	Routine Testing of final effluent quality	Compliance Parameters Monitored	Method of Disinfection on final effluent	Disposal
Alotau	Primary Septic Tank	Quarterly Basis	ph, Temperature, Dissolved Oxygen, Total Suspended Solids, Biochemical Oxygen Demand, Chemical Oxygen Demand, Oil & Grease, Nitrogen, Phosphorus, Total Coliform, Faecal Coliform	Chlorination	Sea Outfall
Kimbe	Biological Treatment ponds	Quarterly Basis	ph, Temperature, Dissolved Oxygen, Total Suspended Solids, Biochemical Oxygen Demand, Chemical Oxygen Demand, Oil & Grease, Nitrogen, Phosphorus, Total Coliform, Faecal Coliform	Chlorination	Stream Discharge
Kundiawa	Biological Trickling Filter	Quarterly Basis	ph, Temperature, Dissolved Oxygen, Total Suspended Solids, Biochemical Oxygen Demand, Chemical Oxygen Demand, Oil & Grease, Nitrogen, Phosphorus, Total Coliform, Faecal Coliform	Chlorination	Stream Discharge
Lae	Pre-treatment – grit chamber + screens + Biological Treatment Pond	Monthly Basis	ph, Temperature, Dissolved Oxygen, Total Suspended Solids, Biochemical Oxygen Demand, Chemical Oxygen Demand, Oil & Grease, Nitrogen, Phosphorus, Total Coliform, Faecal Coliform	Chlorination	Sea Outfall + River Discharge
Madang	Biological Treatment ponds & Lagoons	Quarterly Basis	ph, Temperature, Dissolved Oxygen, Total Suspended Solids, Biochemical Oxygen Demand, Chemical Oxygen Demand, Oil & Grease, Nitrogen, Phosphorus, Total Coliform, Faecal Coliform	Chlorination	Stream Discharge
Mt Hagen	Biological Treatment ponds	Quarterly Basis	ph, Temperature, Dissolved Oxygen, Total Suspended Solids, Biochemical Oxygen Demand, Chemical Oxygen Demand, Oil & Grease, Nitrogen, Phosphorus, Total Coliform, Faecal Coliform	Chlorination	River Discharge
Popondetta	Biological Treatment ponds	Quarterly Basis	ph, Temperature, Dissolved Oxygen, Total Suspended Solids, Biochemical Oxygen Demand, Chemical Oxygen Demand, Oil & Grease, Nitrogen, Phosphorus, Total Coliform, Faecal Coliform	Chlorination	River Discharge