I-05: Net Positive Water – Above Green

Community water use and release must work in harmony with the natural water flows of the Community and its surroundings.

100% of the Community’s water needs must be supplied by captured precipitation or other natural closed loop water systems, and/or by recycling used Community water, and must be purified as needed without the use of chemicals.

All stormwater and water discharge, including grey and black water, must be treated and managed at the Community scale either through reuse, a closed loop system, or infiltration.

EXCEPTIONS

LCC I05-E1 5/2014 - Municipal Potable Water Supply

If health or utility regulations require a project to use municipal potable sources, it is allowed, but only for potable uses including sinks, faucets, janitorial uses, and showers. Non-potable uses such as irrigation, toilet flushing, clothes washing, and equipment uses must use water sourced from the project site. While it is not required, the project is encouraged to include full rainwater harvesting capacity in anticipation of future regulatory acceptance of additional rainwater use.

To use this Exception the project team must exhaust all regulatory appeals short of legal appeals. In addition, the team must demonstrate through design drawings and calculations how the Community is designed to meet the requirement for 100% site-sourced water. (Related to LBC I05-E1 4/2010 Municipal Potable Water Supply)