Water treatment plant means that portion of the water supply system which in some way alters the physical, chemical, or bacteriological quality of the water.
Wastewater treatment plant means a facility designed and constructed to receive, treat, or store waterborne or liquid wastes.
Wastewater treatment system means any equipment, plants,
Wastewater Treatment Works means an arrangement of devices and structures for treating wastewater, industrial wastes, and sludge. Sometimes used as synonymous with "waste treatment plant" or "wastewater treatment plant" or "pollution control plant".
Wastewater treatment unit means a device which: