Frequently asked questions

Answers to questions regarding UL certification of products to NSF Standards, regulatory acceptance of the UL marks, and other certification-related information. Learn more.

Food safety

UL is a recognized leader in food safety product certification and education. Learn more.

Drinking water

UL has a wide range of programs with the ultimate goal of providing safe drinking water in accordance with nationally recognized standards and regulations. Learn more.

Swimming pools and spas

Useful information on safety program and services.  Learn more.

Environmental sustainability

UL is expanding our core commitment of building a safer world today to building a greener world tomorrow. Learn more.