Has anyone found a good spreadsheet/website that calculates the approximate size of a rainwater tank needed for a given roof area and water usage?

If a project treats 100% wastewater and reuses it for irrigation except the treatment in done through local govt utilities service provider, can the project claim point under Innovative Waste water

We are working on a large scale City Garage project targeting LEED Silver certification. We are considering rainwater harvesting and using it to meet the demands of truck washing.

Our building is on a college campus and we plan to route all condensate to the campus grey water system. Does this qualify even though it is not being used on-site?

Hi, My project is a factory building. They are installing only Indian Water Closets and no Urinals. How to calculate water efficiency if Urinals are not used?

If we have prepared piping but cistern is not installed yet and it will possibly be installed in the future, can we get credit for it?

Hi, working on an office building project, we r pursuing this credit through option 2 : "Treat 50% of wastewater on-site...etc." Through the design Preliminary Review we received a comment stating

Here is a situation: Rain water is captured and treated for reusing to flush and flow fixtures. A single cistern storages both rainwater and municipal water supply.