---
url: https://www.eurocovers.eu/glossary/nsf-61
term: NSF-61
definition: NSF/ANSI 61 is the standard for chemical safety of products in contact with drinking water. Required certification for materials used on potable water reservoirs in the EU and US.
updated: 2026-05-25
---

# NSF-61

NSF/ANSI 61 is the standard for chemical safety of products in contact with drinking water. Required certification for materials used on potable water reservoirs in the EU and US.

**NSF-61** (NSF/ANSI 61) is the standard for chemical safety of products in contact with drinking
water — including pipes, fittings, mechanical devices, joining materials, and floating cover
materials. NSF-61 certification confirms that material contact does not contribute regulated
contaminants to the water. NSF-61 certified HDPE is approved for direct potable water contact in
the EU (satisfying Drinking Water Directive material requirements) and the US.