Underwriters Laboratories Inc.

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Drinking Water Analytical Services

Certifications

Our commitment to quality is reflected in our certification and audit record. UL is certified in 48 states and Puerto Rico, giving us the broadest set of certifications for drinking water analysis. We were also one of the first laboratories certified under the National Environmental Laboratory Accreditation Program (NELAP), a program that implements voluntary performance standards for the operation of environmental laboratories.

Each year our laboratory is audited by many organizations including the states in which we are certified, as well as the American National Standards Institute, U.S. Air Force, U.S. Army Center for Health Promotion and Preventative Medicine, and the United States Environmental Protection Agency.

Please click on the map below to download a copy of our current certificate for that state.

Note: Some certifications may appear to be expired while enhancements are being made to this site. Please contact a project manager at 1-800-332-4345 with any questions regarding certification status.

Hawaii Puerto Rico Maryland Delaware New Jersey Connecticut Rhode Island Massachusetts New Hampshire Vermont Maine New York Pennsylvania West Virginia Virginia South Carolina North Carolina Florida Georgia Alabama Mississippi Tennessee Kentucky Ohio Indiana Illinois Michigan Louisiana Arkansas Texas Oklahoma New Mexico Missouri Wisconsin Iowa Minnesota Kansas Nebraska South Dakota North Dakota Colorado Wyoming Utah Arizona Nevada California Montana Idaho Oregon Washington Alaska
Accredited in accordance with NELAC.

Contact Us

For more information on UL's drinking water analytical services you may email us or call +1-800-332-4345. You may also wish to visit our FAQs.