NSF certification
NSF certification
Tested and certified by NSF against a public health or food equipment standard.
What it looks like
The letters NSF inside a blue circle or oval.
What it means
Most often met on water filters, commercial catering equipment and dietary supplements. The standard number printed with it is what the mark actually claims: NSF/ANSI 42 covers aesthetic reduction such as chlorine taste, while 53 covers health-related contaminants including lead and cysts, and a filter certified to 42 alone makes no health claim at all. On catering equipment it certifies that surfaces and joints can be cleaned to a sanitary standard.
Defined by NSF/ANSI standards. Where a symbol differs between standards, the difference is described above rather than resolved — both versions are in circulation on real labels.
Other certification marks symbols
| Symbol | Means |
|---|---|
| Energy Star | The product meets US Environmental Protection Agency efficiency criteria for its category. |
| Fairtrade Mark | The certified ingredients were bought on Fairtrade terms, including a minimum price and a premium paid to the producer organisation. |
| OEKO-TEX Standard 100 | Every component of the textile was tested for harmful substances and passed. |
| Woolmark | The product is made from pure new wool and meets the Woolmark performance specifications. |
| BSI Kitemark | BSI has tested the product and audits the factory that makes it. |
| GS mark (Geprüfte Sicherheit) | Tested safety — a German voluntary mark requiring independent testing and factory surveillance. |
| Kosher certification (OU and others) | A certifying agency attests that the product is kosher, often with a letter alongside for the category. |
| Halal certification | A certifying body attests that the product complies with Islamic dietary rules. |
| USDA Organic seal | At least 95% of the ingredients are certified organic under the US National Organic Program. |
| EU organic leaf | At least 95% of the agricultural ingredients are organic under EU rules. |
| Crossed grain (certified gluten free) | Independently certified to contain no more than 20 parts per million of gluten. |
| Vegan Society sunflower | Registered with the Vegan Society: no animal ingredients and no animal testing at any stage. |
| Leaping Bunny | Certified cruelty free: no animal testing by the company, its suppliers or third parties after a fixed cut-off date. |
Common questions
- What does the nsf certification symbol mean?
- Tested and certified by NSF against a public health or food equipment standard.
- What does it look like?
- The letters NSF inside a blue circle or oval.
Related pages
- BSI Kitemark BSI has tested the product and audits the factory that makes it.
- Food safe (glass and fork) The article is intended to come into contact with food.
- Energy Star The product meets US Environmental Protection Agency efficiency criteria for its category.
- Fairtrade Mark The certified ingredients were bought on Fairtrade terms, including a minimum price and a premium paid to the producer organisation.
- OEKO-TEX Standard 100 Every component of the textile was tested for harmful substances and passed.
- Woolmark The product is made from pure new wool and meets the Woolmark performance specifications.
- BSI Kitemark BSI has tested the product and audits the factory that makes it.
- GS mark (Geprüfte Sicherheit) Tested safety — a German voluntary mark requiring independent testing and factory surveillance.
- Kosher certification (OU and others) A certifying agency attests that the product is kosher, often with a letter alongside for the category.
- Halal certification A certifying body attests that the product complies with Islamic dietary rules.
- USDA Organic seal At least 95% of the ingredients are certified organic under the US National Organic Program.
- EU organic leaf At least 95% of the agricultural ingredients are organic under EU rules.
Sources
- Official vendor product documentation — At One Place