38. In this Chapter—
“collecting system” means a system of conduits which collects and conducts urban waste water;
“domestic waste water” means waste water from residential settlements and services which originates predominantly from the human metabolism and from household activities;
“industrial waste water” means any waste water which is discharged from premises used for carrying on any trade or industry, other than domestic waste water and run-off rain water;
“urban waste water” means domestic waste water or domestic waste water mixed with either or both of industrial waste water and run-off rain water.