Environmental Laboratory (NELAP) Accreditation
Laboratories are assessed against the provisions of the 2009 TNI NELAP standards.
Effective on December 01, 2014, EPA Method 200.5 was added to the Drinking Water and Non-Potable Water Fields of Accreditation (FoAs). From this date on, laboratories submitting data analyzed by this method need to be accredited or risk having their data refused by the TCEQ. The analytes offered for this method will be:
Subscribe to NELAC e-mail updates
Go to this link: Get e-mail updates on your choice of topics.
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 7 - August 2012)
Fields of Accreditation (FoAs) (PDF) (Revision 15 - December 2014)
The current list of accredited laboratories, with links to their scope of accreditation, can be accessed here:
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) (June 08, 2015)
For administrative information, please contact our records specialist at 512/239-3754 or e-mail us at email@example.com.
For additional information, including suitable ways to obtain traceability of measurements, or to make a complaint, please contact the program manager at 512/239-1990 or e-mail us at firstname.lastname@example.org.
Frequently Asked Questions (FAQs)
This is a document addressing frequently asked questions regarding the Texas laboratory accreditation program:
FAQ guides (PDF)
Our mailing address is:
Texas Laboratory Accreditation Program
Texas Commission on Environmental Quality
P.O. Box 13087, MC-165
Austin, TX 78711-3087
Our physical address for overnight mail delivery is:
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)