Substance | Certifying Agency | NSF/ANSI Standard |
Lead | NSF International | 53 |
Chromium | NSF International | 53 |
Mercury | NSF International | 53 |
Hydrogen Sulfide | NSF International | 42 |
Chlorine Taste and Odor | NSF International | 42 |
Iron | WQA | 42 |
Zinc | WQA | 42 |
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