Treated Water, Not for Drinking Purposes

This is a tanker (not seen one of these before) that a builder uses to transport excess treated STP water from an apartment he manages to a site where construction is ongoing (one of his own projects). The excess treated waste water is used for construction. This tells us that he is confident of his own quality of treated waste water . Many builders often shy away from using treated waste water for construction as they do not want to take chances with the quality of construction. Good to see this responsible action