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FAQs about WEc1 :

Can non-potable well water that is used for irrigation contribute to potable water reduction?

Can surface water, such as water from an irrigation ditch or a local creek, be used as nonpotable water?

Do interior planters count in the calculation?

We are using non-potable water for irrigation. For drought conditions, can we hook up to a potable water source for backup and still earn this credit?

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NC-2009 WEc1:Water Efficient Landscaping

WEc1 Option 2 Path 1

Hi, I have a project planning to use 100% non- potable water for irrigation.They are planning on doing this through collecting rain water. It rains a good bit in the area of the project but sometimes there will be 1 dry month in the summer. Would they be able to use potable water that month (I told them probably not, then not 100%). Is the only option here to get water that month from a public agency in the area that supplies treated non-potable water for irrigation?

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Nadav Malin
CEO
Green Commons, LLC
LEEDuser Expert
586 thumbs up

Wed, 11/21/2012 - 21:12

Hi Don,There may be other sources of non-potable you can tap for those dry months. Cooling system condensate is an option, especially if humidity is high. Graywater from sinks might also work, if health codes allow it. But you definitely cannot plan on using potable water if you're claiming the 100% reduction. 

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