Landscape Water Budget Tool

To assist home builders, landscape professionals, and irrigation partners in meeting the outdoor criteria of a future WaterSense specification for new homes, EPA has developed a Landscape Water Budget Tool to help guide them through the water budget calculations of the draft specification for water-efficient, single-family new homes. The landscape water budget tool will help determine:

  • The amount of water the designed landscape is allowed (budgeted) based on EPA criteria.
  • How much water the designed landscape requires based on climate, plant type, and irrigation system efficiency.
  • Whether the designed landscape meets the budgeted amount.

The Landscape WaterBudget Tool is in draft form at this time. EPA is inviting all interested parties to provide comments on this new tool, specifically recommendations on data sources and sources of local reference evapotranspiration.

To read the budget tool and approach strategy:

Send comments or suggestions to The public comment period ends on Friday, Dec. 19, 2008. The Draft Water-Efficient Single-Family New Home Specification and public comments are available at EPA plans to issue a second draft of the Water-Efficient Single Family New Home Specification in early 2009.

If you have questions about the landscape water budget tool, please contact the WaterSense Helpline at (866) WTR-SENS (987-7367) or e-mail

Source: EPA Waterheadlines

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