Environmental Laboratory (NELAP) Accreditation
NOTICE
Effective July 1, 2011, the TCEQ will begin assessing laboratories using the standards adopted in 2009 by The NELAC Institute (i.e., the 2009 TNI standards) as planned. This will include all requirements related to proficiency testing.
The PT providers are prepared to start evaluating PT results according to the 2009 TNI NELAP standards (e.g., LOQ reporting). However, some NELAP accreditation bodies (ABs) will not be immediately adopting the TNI standards regarding reporting and scoring PT results due to their states' unique statutory requirements. We advise laboratories holding primary and secondary accreditations from ABs outside Texas to contact those ABs to clarify their respective PT requirements.
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After entering your e-mail address and personal preferences, mark the Laboratory Accreditation / Environmental Laboratory (NELAC) Accreditation box.
Application, Fields of Accreditation, Checklists, and Procedures
Application (PDF) (Revision 6 - February, 2012)
Fields of Accreditation (FoAs) (PDF) (Revision 13 - January 2012)
History of changes to the Fields of Accreditation (PDF)
Laboratories are assessed against the provisions of the 2009 TNI NELAP Standards. (PDF) 
The current list of accredited laboratories, with links to their scope of accreditation, can be accessed here:
List of Accredited Laboratories (PDF)
The accreditation team uses the 2009 TNI Quality Systems checklist to determine each laboratory's conformance to the elements of this Standard. A copy of the TNI checklist is now available directly from their web page.
Be advised that you must have a copy of the TNI Standard ELV1, Management and Technical Requirements for Laboratories Performing Environmental Analyses before you may download this checklist.
TCEQ (Internal) Accreditation Procedures (PDF)
For administrative information, please contact our Records Specialist at 512/239-3754 or e-mail us at labprgms@tceq.texas.gov.
For additional information, including suitable ways to obtain traceability of measurements, or to make a complaint, please contact Steve Stubbs at 512/239-6343 or Steve Gibson at 512/239-1518 or e-mail us at labprgms@tceq.texas.gov.
External Links
NELAP Fields of Proficiency Testing
Our mailing address is:
Texas Laboratory Accreditation Program
Texas Commission on Environmental Quality
P.O. Box 13087, MC-165
Austin, TX 78711-3087
Rules (Including Fees) and Accreditation Standards
- Title 30, Texas Administrative Code, Chapter 25 , Subchapters A and B (for a schedule of fees refer to §25.30)
