UL 979 — Water Treatment Appliances
Reference: UL 979 · Scheme: OSHA NRTL product safety. The 4 laboratories below appear in the Current list of Nationally Recognized Testing Laboratories for this standard. Retrieved July 2026; ranking criteria on the methodology page.
| # | Laboratory | Location | Cert / ID | Approved | Registry accreditations |
|---|---|---|---|---|---|
| 1 | Intertek Testing Services NA, Inc. | Lake Forest, California, United States | — | — | 9 |
| 2 | TUV SUD America Inc. | San Diego, California, United States | — | — | 5 |
| 3 | NSF International | Ann Arbor, Michigan, United States | — | — | 1 |
| 4 | International Association of Plumbing and Mechanical Officials EGS (IAPMO) | Ontario, California, United States | — | — | 1 |
Facts reproduced from the linked registry as retrieved July 2026. No ratings, no reviews — see methodology.