ASTM E2635

ASTM E2635 is the ASTM standard for water conservation in buildings through in-situ water reclamation. It provides a technical framework for considering how water can be reclaimed and reused within a building to reduce potable water demand and improve overall water efficiency. For owners, designers, and facility teams, this standard matters because it supports more consistent planning and evaluation of reclaimed-water approaches in building systems.

Overview of ASTM E2635

The Standard Practice for Water Conservation in Buildings Through In-Situ Water Reclamation focuses on the practical use of water reclaimed on-site within a building environment. ASTM E2635 is intended to guide a structured approach to water conservation by addressing in-situ reclamation as part of building design, operation, or retrofit planning. As an ASTM standard, it is useful when teams need a shared technical reference for evaluating water-saving strategies and aligning project decisions with conservation goals.

Common use cases of ASTM E2635

ASTM E2635 is commonly used in building projects where reclaimed water may be collected, treated, and reused on-site for conservation purposes. It can support design reviews, sustainability planning, and assessment of building water systems where nonpotable reuse is being considered. The standard is especially relevant when comparing water-efficiency approaches, documenting project intent, or evaluating whether an in-situ reclamation strategy fits a facility’s operational and compliance objectives.

Benefits of using ASTM E2635

Using ASTM E2635 can help teams apply a more consistent and defensible approach to water conservation planning. It may improve communication among stakeholders by giving them a common technical basis for in-situ water reclamation decisions. The standard also supports better project documentation, more reliable procurement and engineering review, and reduced risk when evaluating water-reuse concepts. For organizations focused on efficiency and responsible resource use, ASTM E2635 offers a practical reference point.

• Supports on-site water reclamation planning
• Helps guide building water conservation decisions
• Useful for design, review, and evaluation workflows
• Provides a common ASTM reference for stakeholders