Waste & Water
WasteThis may be the hardest section of the calculator to complete as most organisation's don't tend to keep records of how much waste they produce. “Best guess” estimates for the amount of waste produced can be used here.
WaterThis section relates only to water supplied by pipe to your building(s). If you gather rain from guttering to store and use, that is not to be included.
If your building is on an unmetered connection then use a best guess estimate of water consumption. Generally, water supplied to the property and waste water should be equal.