Are Hach methods for total nitrogen EPA approved?

Document ID

Document ID TE1119

Published Date

Published Date 27/05/2017
Question
Are Hach methods for total nitrogen EPA approved?
Summary
EPA approval of total nitrogen
Answer
Total nitrogen is not a parameter regulated by the EPA and so there is no approved method for reporting purposes. However, the EPA is approving S-TKN which contains the total nitrogen component.

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