Do water features need to be included in calculations?

Cindy, this is an interesting question. The credit language refers to outdoor water use, not just irrigation, so at first glance I think you should include it. However, LEED has traditionally not included "process loads" -- whether energy or water -- in prerequisite requirements especially, but also credit requirements to some extent. I would define both of these uses as process loads of the building, not typical regulated loads. In LEED 2009, I would feel confident leaving these out. However, I haven't seen this explicitly addressed in LEED v4 and given the inclusive credit language I would call it a gray area. Have you checked LEED Interpretations? Best to check with GBCI or your LEED Coach, etc., to get a clear answer. Let us know what you learn.