Test methods are approved procedures for measuring the presence and concentration of physical and chemical pollutants, evaluating properties such as toxic properties of chemical substances, and measuring the effects of substances under various conditions. The EPA has formulated hundreds of test methods that must be used by U.S. labs. Test methods are made available to the scientific and regulated communities in several ways, including the Code of Federal Regulations, the Technology Transfer Network and through EPA publications.

Recommended EPA Web pages

• Index to EPA Test Methods
  To respond to frequent requests for agency test methods, Library staff developed a methods index as a reference tool to help locate copies.
• Environmental Test Methods and Guidelines
  Specific test methods and procedures as well as an index for materials not in electronic format.