Definition of non-potable

Jeff - Unfortunately, I don't think your well system will comply with this credit under Option 4. If you look at the intent of the credit, it says "To limit or eliminate the use of potable water or other natural surface or subsurface resources available on or near the project site for landscape irrigation." Your well system would certainly fall under "natural surface or subsurface resources available on or near the project site." This is further reinforced on the v2008 Template, as Option 4 requires you to certify that your irrigation system does not use "natural surface or subsurface water." Unfortunately, nonpotable water is not clearly defined in the "Definitions" section of this credit, but p. 103 of the LEED Reference Guide for Green Building Operations and Maintenance describes it as "rainwater, graywater, or reclaimed water", and some examples are given in the text.