Free cyanide is regulated under the Safe Drinking Water Act (SDWA). This document outlines and clarifies the Code of Federal Regulations entries associated with monitoring for cyanide under SDWA.
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Cyanide Clarification of Free and Total Cyanide Analysis for SDWA Compliance, Revision 1.0 (PDF)(12 pp, 300 K, June 2020, 815-B-20-004)