Environmental Laboratory (NELAP) Accreditation
Laboratories are assessed against the provisions of the 2009 TNI NELAP standards.
Don’t miss the early registration deadline for the TCEQ Environmental Trade Fair & Conference, March 17th. The Lab Practices and Data Reporting Track includes the following presentations:
- Untapped Power of Data Validation
- The 2016 TNI Laboratory Accreditation Standard: Quality Systems and Microbiology Testing
- The 2016 TNI Chemistry Standard
- Root Cause Analysis: Key Elements to Effective Corrective Action
- Corrective Action Response Guidelines for TCEQ Accredited Laboratories
- Method Equivalency Under 40 CFR 136.6: What Modifications are Allowed and What Documentation Should Laboratories Have for Assessments
- Flexible Approaches to Environmental Measurement
- Common Findings in Microbiology
- Navigating the Challenges for Analysis of PFAS in Environmental Matrices to Meet TRRP Requirements
- TCEQ Laboratory Accreditation Program: What Questions Would You Like to Ask?
A full list of presentations scheduled can be found on the Environmental Trade Fair and Conference webpage. Technical staff will also be available at the TCEQ booth in the exhibit hall to answer questions.
The TCEQ Lab Accreditation Program has issued a revision to the drinking water fields of accreditation for microbiology. The fields have been revised to provide more clarity for the accredited laboratory, to include E. coli as an analyte in addition to total coliforms for presence/absence analyses, and to reflect the Revised Total Coliform Rule (40 CFR 141.851) which went into effect on April 1, 2016. The changes to the drinking water fields of accreditation for microbiology are effective October 15, 2016.
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 17 - October 2016)
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.
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)