Delivering value to the drinking water treatment unit industry

When choosing a certifier for your drinking water treatment unit, make UL your one-stop provider for the recognition, technical expertise and customer service that comes only from the global leader in product certification.

One-stop certification services

UL is able to meet all of your testing needs for health effects of water treatment units. UL provides compliance testing and certification for:

• ANSI/NSF Standard 42, Drinking Water Treatment Units -- Aesthetic Effects
• ANSI/NSF Standard 53, Drinking Water Treatment Units -- Health Effects
• ANSI/NSF Standard 44, Cation Exchange Water Softeners
• ANSI/NSF Standard 55, Ultraviolet Microbiological Water Treatment Systems
• ANSI/NSF Standard 58, Reverse Osmosis Drinking Water Treatment Systems
• ANSI/NSF Standard 62, Drinking Water Distillation Systems
• ANSI/NSF Standard 177, Shower Filtration Systems -- Aesthetic Effects
• DWTU Standards

The Water Quality Mark -- an important credential in your key markets

• UL's water product certification program is fully accredited in the United States and Canada
• UL's water product certifications are accepted by all states, including California, and cities in the United States with their own water product certification requirements
• UL's program is recognized as a certifier of water products by the U.S. Environmental Protection Agency