He tukanga e tangohia ake ai te nuinga o ngā matū tāoke i te parakaingaki, arā, te hamuti tangata me te waipara ka puhaina atu i ō tātou kāinga, ka rere atu ki te taupuni whakatika parakaingaki o te tāone.
A process to remove most of the contaminants in sewage - the human excrement and wastewater that is flushed away from our homes and flows to the town's sewage treatment facility.