EPA offices and laboratories, and outside organizations, have developed approved methods for measuring the concentration of a substance or pollutant.  Below are categories of methods. Learn about how methods are developed on the Method Development page. 

On this page:

• Air and Radiation
• Water
• Prevention, Pesticides, and Toxic Substances
• Research and Development - Not Approved
• Solid Waste and Emergency Response
• Index to EPA Test Methods

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Air and Radiation

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Index to EPA Test Methods

• April 2003 Revised Edition