An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Overview of EPA Pesticide Laboratories and Methods

EPA operates two pesticide laboratories that provide a variety of technical services to the Agency, other federal and state agencies, tribal groups and other organizations:

The labs assist EPA and state enforcement labs by:

  • providing:
    • reference standards,
    • analytical methods development,
    • training,  
    • assistance with laboratory audits; and
  • developing analytical methods for risk assessment and enforcement projects;
  • performing chemical and efficacy analyses when needed; and
  • assisting in investigations of incidents such as crop damage or illegal pesticide residues. 

Our laboratories develop methods and procedures to measure the effectiveness of hard surface disinfectants. They use testing methods to identify pesticides in food, feed, water, and soil. Pesticide residue amounts in a sample are measured, including any significant chemical metabolites and degradates (break-down products). 

Pesticide manufacturers must develop environmental chemistry and residue analytical methods and provide them to EPA as a requirement of product registration.

Find methods: