There is municiply provided water available, called raw water which, as per the standard has less than 5,000 mg/l of Total Disolved Solids. The problem is that this is well water (but drawn on a municiple scale, not project scale). The EPA standard as well as the standard applicable to our project requires less than 500 mg/l TDS as well as a number of other limits. Potable water is also provided by the municpality but has undergone desalination or other treatment to reach this level of purity.

Reading through the reference guide seems to contradict itself. The Intent mentions potable water, surface water and subsurface water use reduction but the requirements only mention potable water reduction. And the definition of potable water states that it meets EPA or municipality limits.

Our municipaly provided water is well water but not potable water. As far as I can tell, this specific situation has not been addressed by LEED. Any help is appreciated as we would like to benefit from using this raw water for irrigation and waste (flushing of toilets).