NSF Certified
What it is
NSF is an independent nonprofit that writes public-health standards (NSF/ANSI) and tests/certifies products against them — best known for water treatment, food equipment, and consumer product claims.
What it covers
Water-filter contaminant-reduction claims (lead, PFAS, chlorine by standard number), food-contact materials and equipment, and a broad range of product health-effects standards.
How to verify
Search listings.nsf.org for the company or product and confirm the certification against the specific NSF/ANSI standard. Listings show only currently certified products and regenerate nightly.
How SafeMama uses it
NSF certification to a named standard is a top trust signal for water filtration and food-contact picks. Claims always carry the standard number, a dated lookup, and a link to the live listing.
Limitations / conflicts
The mark alone says little — the standard number is the claim. Delisted products silently disappear from the database, and NSF itself disclaims perfect listing accuracy. Manufacturers pay for testing and certification.
Verify it yourself
Don't take our word for it — check the source directly. Certifications lapse and data changes; the official database is always the current answer.
Worth knowing
- NSF listings show currently certified products only - delisted products drop out; NSF notes omissions or errors may occur, confirm with NSF