Surface finishes: paints, glazes, and colorants

  • Paints, colorants, inks, and glazes used on HWTS products and packaging should meet relevant national standards (or US/ISO in the absence of national standards) for food-grade materials and packaging.
  • Paints, colorants, inks, and glazes are resistant to disinfectants (halogens or others) used to treat water.

Key indicator

  • All materials in contact with drinking water for a drinking water treatment unit comply with NSF Standards 42 and 53 and any other technology-specific NSF standard (e.g., 44, 55, 58, 62).

Notes and exceptions

  • Toxins such as lead, present in many paints and glazes, disproportionately affect developing fetuses, infants, and small children.

Supporting evidence