Bluewater is fresh surface and groundwater, in other words, the water in freshwater lakes, rivers, and aquifers.
Blue water sources are Surface Water, Groundwater, Municipal Blue, Water, Municipal Water (Origin Unknown), Brackish surface water/seawater, Condensate from External Steam Source, and Rainwater.
Grey water is water that has been polluted by human activity (e.g. industrial and/ or domestic sources).
Grey water sources are: Municipal Grey Water, Recycled Water, Reuse Water, Treated Wastewater from External Sources, and Untreated Wastewater from External Sources (treated internally).