Pacific Institute Report Recommends IAPMO’s Water Demand Calculator
IAPMO announced that its Water Demand Calculator has been featured as a key recommendation in the Pacific Institute’s new landmark report, “Untapped Potential: An Assessment of Municipal and Industrial Water Efficiency Potential in the United States.”
The first-of-its-kind national assessment finds that improving water efficiency could reduce municipal and industrial water use across the United States by 25-60%, saving billions of gallons each day and significantly lowering infrastructure and energy costs. The Pacific Institute specifically recommends the adoption of IAPMO’s Water Demand Calculator as an essential tool to achieve these savings by right-sizing plumbing systems to reduce structural water waste, lower construction costs and improve water quality.
The report asserts: “States and municipalities should amend their plumbing codes to require IAPMO’s Water Demand Calculator for estimating peak demand and provide training on its use for inspectors, installers, and design professionals.”
The Pacific Institute is a leading nonpartisan research organization dedicated to advancing water sustainability and resilience through innovative science-based analysis, policy recommendations and partnerships that promote equitable and efficient water management solutions worldwide.
Christoph Lohr, IAPMO’s vice president of Technical Services and Research, played an integral role in the development of the report as a member of its Advisory Group. His research and several IAPMO publications are cited throughout the study, underscoring the organization’s leadership in advancing practical, evidence-based water efficiency solutions.
Developed by IAPMO through years of technical research and collaboration with industry partners, the Water Demand Calculator enables designers and engineers to more accurately estimate peak water demand in residential and multifamily buildings. By aligning plumbing system design with actual water use patterns rather than outdated assumptions, the tool helps reduce pipe sizing, minimize stagnation and improve system efficiency and performance.
Read more about the Water Demand Calculator here: iapmo.org/we-stand/water-demand-calculator
