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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.

Proposed Rule

The proposed rule has been signed by the EPA Administrator and is being prepared for publication.

Background Information

Additional Information

For further information on the proposed rule, please contact Meghan Hessenauer, hessenauer.meghan@epa.gov or 202-566-1040.