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 This website is no longer updated and links to external websites and some internal pages may not work.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 »


Product Specification Review

Understanding the bill bannerThe America’s Water Infrastructure Act of 2018, signed on October 24, 2018, formally authorized the WaterSense program. This law also requires that, by December 31, 2019, EPA must “consider for review and revise, if necessary, any WaterSense performance criteria adopted before January 1, 2012.” As a result, several WaterSense specifications—including those for tank-type toilets, lavatory faucets and faucet accessories, showerheads, flushing urinals, and weather-based irrigation controllers— were reviewed for potential improvements to water efficiency and/or product performance.

In April 2020, WaterSense issued a notice in the Federal Register to inform the public of the results of the specification review.  The agency has made the decision that it will not make updates or changes to the product specifications.  The notice also invites public input on how the WaterSense program should consider consumer satisfaction in product specification development. 


In December 2018, WaterSense issued a Notice of Specification Review to inform the public of the specifications under review and to invite stakeholders to provide feedback. The notice provides general criteria for reviewing WaterSense specifications, summarizes the current specifications and market for each product category, and offers general questions for stakeholders to consider when providing feedback. It also discusses the revision process and tentative timeline for EPA’s adherence to this law.

On February 14, 2019, EPA held a teleconference and webinar with stakeholders to discuss the Notice of Specification Review

EPA hosted a series of webinars during 2019 that were targeted to specific stakeholder groups to discuss information collected to date and focus in greater depth on topics and issues related to each product category. These webinars were open to all stakeholders but were targeted towards manufacturer and utility partners that would be impacted by specification revisions.