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Clean Water Act Analytical Methods

Methods Update Rule - 2019

""Rule Summary

EPA is proposing:
  • revised EPA methods;
  • new or revised methods published by voluntary consensus standard bodies, such as ASTM International and the Standard Methods Committee;
  • new or updated methods developed by the U.S. Geological Survey;
  • methods reviewed under the Alternate Test Procedures program; and
  • minor changes to quality assurance and quality control within individual methods.

The public comment period closed on December 23, 2019. EPA is preparing a final rule for publication later in 2020.

Proposed Rule

You can view the submitted public comments at regulations gov. The Docket Number is EPA-HQ-OW-2018-0826.

Background Information

Additional Information

For further information on the proposed rule, please contact Meghan Hessenauer ( or 202-566-1040.