The following water sources count as reused for credit purposes: graywater (lavatory, sink and shower water), harvested rainwater (cistern, underground, or pond), nuisance water (water that must be pumped away from the building), treated wastewater, air-c

The following water sources count as reused for credit purposes: graywater (lavatory, sink and shower water), harvested rainwater (cistern, underground, or pond), nuisance water (water that must be pumped away from the building), treated wastewater, air-conditioner condensate, reverse-osmosis reject, and sump-pump water. All well water is counted as potable for credit purposes.