develop consensus standards for use by TNI's programs. This group has a support role in assisting other programs with activities such as guidance and standards interpretation.
fosters the generation of data of known and documented quality is through the National Environmental Laboratory Accreditation Program, or NELAP. The purpose of this program is to establish and implement a program for the accreditation of environmental laboratories.
is to establish and maintain a national PT program to support TNI’s National Environmental Laboratory Accreditation Program, and other activities.
Field Activities Program (NEFAP) Executive Committee is to establish and implement an accreditation program for field sampling and measurement organizations (FSMOs).
on a variety of topics of interest to the environmental measurement community. TNI also hosts two regularly scheduled meetings per year, typically in January and August. Both are a week long and involve open meetings of TNI committees as well as training courses and other special sessions.Notice of Proposed Revisions to TNI Fields of Proficiency Testing Tables - Comment Period Open Through January 31, 2026
Date Posted: 12-17-2025
The NELAC Institute (TNI) Proficiency Testing Program Executive Committee (PTPEC) is approving revisions to the TNI Fields of Proficiency Testing (FoPT) tables for Whole Effluent Toxicity Testing in Non-Potable Water (NPW).
Summary of Changes
Changes specifically address criteria for Non-NOEC analytes.
Request for Public Comment
PTPEC is soliciting public comments on the changes outlined above and highlighted in magenta in the updated FoPT tables linked below. The comment period will remain open for 45 days, closing on January 31, 2026.
WETT_FoPT_2025_08_27 Draft.xlsx (Excel)
WETT_FoPT_2025_08_27 Draft.pdf (PDF)
Submit comments to both:
- Susan Jackson: [email protected]
- Robert Wyeth: [email protected]
Comment Submissions Must Include:
- Name
- Affiliation
- Email Address
- Phone Number
- Comments
All submitted comments will be reviewed by the PTPEC and, if appropriate, incorporated into the tables prior to final PTPEC approval and determination of an effective date.
Thank you for your continued support in maintaining the integrity and accuracy of the TNI Proficiency Testing Program.