Products. Support. Expertise. Hach^® provides the right solution for your specific application. With almost a decade of experience delivering the right solutions and the greatest number of EPA approved methods, Hach is your trusted partner in water analysis.

EPA Approved Methods

The EPA has evaluated and approved new technological methods developed by Hach Company. All EPA Approved methods are cited in the Federal Register and compiled in the Code of Federal Regulations at 40 CFR 136 and CFR 141.

EPA Accepted Methods

The EPA has reviewed Hach methods and accepted them for use in compliance monitoring. These methods are defined by EPA as Acceptable versions of previously approved methods. These methods are generally not published in the Federal Register or in the Code of Federal Regulations. A facsimile of the EPA Acceptance letter is available upon request.

EPA Equivalent Methods

All EPA Approved methods have specification criteria built into their procedural steps. When an approved or accepted EPA method has been packaged by Hach from the EPA reference method as a test method that meets or exceeds these specification criteria, these methods are deemed to be equivalent for use in EPA compliance monitoring (40 CFR 136.6). EPA does not normally issue equivalence letters for packaged reference methods.

If you have more questions, please reach out to our Technical Support team.