A waste treatment facility may include a reception area, treatment area, offices, facilities for employees and a visitor centre. Each of these areas will have different energy and water requirements. Each use may provide an opportunity for complementary energy and water efficiency strategies and it will be important to consider how one area may benefit another. For example, grey water from employee facilities may be used in the waste treatment process, or excess heat generated from office or waste treatment equipment might be harnessed to reduce heating requirements elsewhere.