An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »


Water Budget Tool

Image of flowing water.

The WaterSense Water Budget Tool can be used to comply with section 4.1.1, Landscape Design, of Version 1.2 of the WaterSense New Home Specification (PDF) (19 pp, 2250 K, About PDF) or to ensure a measure of efficiency and regional suitability for the amount of water applied to a landscape based on local climate data.

The Water Budget Tool is available as an excel tool (xlsx)(Version 1.04 released June,2020. 1.18 MB). Unfortunately EPA is no longer able to support the web application version of the tool.

Help Using the Water Budget Tool