Code Authorities - Drinking water

UL provides drinking water product certification services, as well as a nationally recognized, state-of-the-art laboratory for chemical, microbiological, and radiological analytical services.

Drinking water related products certified to NSF Standards

The following "Information" links show product category guide information, which typically describes the products covered under the category, their intended use, reference to utilizing manufacturer's instructions, applicable installation codes, limitations regarding the use of the product, the standard or other requirements used to investigate the product, the type of UL Mark on the product, as well as other important facts such as explanation of markings, identification of related categories, and adjunct services.

Drinking water analytical services

• Analytical capabilities of UL's drinking water laboratory
• State certifications of UL's drinking water laboratory

Other drinking water services and programs

• Drinkwell^TM private well testing program
• Bottled water program
• UL emergency response program for water supply threats
• Water Quality Check^TM program
• EPA WaterSense program

Technical articles:

• Drinking Water Treatment Unit Certification
• An Overview of Regulations for Lead Levels in Drinking Water System Components
• Repackaging UL Classified Drinking Water Treatment Chemicals