EPA Finalizes Changes to Part 136 Affecting Laboratories that Perform Water Testing

Method Update Rule
Oral Presentation

Prepared by J. Parr
The NELAC Institute, PO Box 2439, Weatherford, TX, 76086, United States

Contact Information: jerry.parr@nelac-institute.org; 817-598-1155


EPA has finalized a Methods Update Rule (MUR) that:

  • Replaced Methods 608, 624, and 625 with updated versions of these methods,

  • Approved over 100 methods published by ASTM International, Standard Methods, several vendors and other organizations,

  • Clarified the procedures for EPA approval of nationwide and limited use ATPs,

  • Amended the procedure for determination of the method detection limit (MDL) in Appendix B, and

  • Made many other minor changes affecting methods, sample preservation and other issues.

This presentation will provide an overview of the rule.