Testing for NSF/ANSI 383 is a specialized form of extraction (leaching) analysis. A certified laboratory will:
If all extracted contaminants are below the allowed limits, the material receives NSF/ANSI 383 Certification.
For econometricians and sociologists, NSFS 383 is a goldmine. Below are the critical variable groups you will find in the restricted-use version (the public-use file has fewer details).
One of the most important aspects of NSF 383 is its ability to adapt quickly to new health concerns. As of recent updates, the standard has incorporated stricter limits on:
Manufacturers seeking certification now must often prove their materials are PFAS-free or below extremely low detection limits.
"If a product has NSF/ANSI 61, it automatically meets NSF 383." nsfs 383
False. NSF 61 covers non-metallics, but Section 7 (plastics) and the older elastomer protocols are less comprehensive than the dedicated NSF 383. A material can pass NSF 61 but still fail NSF 383 if it contains certain additives.
"NSF 383 is only for large municipal products."
False. It applies to any non-metallic wetted part, from a 12-inch pipeline gasket down to the tiny O-ring inside a residential drinking water filter head.
"All rubber is the same – EPDM is always safe."
False. While EPDM (ethylene propylene diene monomer) is generally safer than some other rubbers, its safety depends entirely on the cure system and additives. NSF 383 tests the final compounded product, not just the base polymer. Testing for NSF/ANSI 383 is a specialized form
The NSF created the SDR to answer one pressing question: What happens to PhDs after graduation? Prior to NSFS 383, data on doctorate recipients was fragmented across university exit surveys and census data, which lacked granularity.
NSFS 383 was developed to address three specific gaps:
The "383" iteration introduced new modules on remote work and the impact of the COVID-19 pandemic on research productivity, making it the most cited SDR cycle in recent years.
Research question: Did computer science PhDs experience a larger shift to telework compared to chemistry PhDs? NSFS 383 variable used:
covid_telework_freq,phd_field_cs,phd_field_chem.
Citation format for NSFS 383:
National Center for Science and Engineering Statistics (NCSES). 2021. National Survey of Doctorate Recipients (NSFS 383), 2019–2021 Restricted-Use File. Alexandria, VA: NSF. https://www.nsf.gov/statistics/srvydoctoratework/
There are 30+ FSRDC locations across the U.S. (e.g., Census Bureau HQ in Suitland, MD; University of California; University of Michigan). You must physically travel to the center or, post-2023, use the Virtual RDC (a secure remote desktop).
For decades, manufacturers tested their non-metallic parts under NSF/ANSI 61. However, regulators and public health officials noticed a gap. The extraction testing in NSF/ANSI 61 is rigorous, but the sheer variety of chemical additives in modern elastomers (e.g., vulcanizing agents, plasticizers, antioxidants, colorants) warranted a more focused and updated protocol.
NSF 383 was developed to: