WaterCare International Pty Ltd (WCI) is an Australian wastewater treatment company setup to treat waste water streams. This is done by means of a Gravity Separation process which uses environmentally friendly agents, to produce safe discharge into the environment or for reuse.

This method of water treatment can operate as a zero discharge treatment system. The sludge could be use for composting, or other, and supernatant, the liquid, possibly for recycling back to the boilers.