Contact Information for Certification Programs and Certified Laboratories for Drinking Water
State-certified laboratories regularly test drinking water samples for compliance with National Primary Drinking Water Regulations.
EPA is unable to test your drinking water upon request. We recommend using a state-certified laboratory if you choose to test your drinking water.
Find a certified laboratory in your state by using this PDF containing links to your state’s laboratory certification program:
- State Certification Programs Certify Laboratories to Conduct Drinking Water Analyses, 40 CFR 142.10(b)(3) (pdf)
EPA gives states primary responsibility for applying safe drinking water standards that public water systems must follow. Public water systems use state-certified laboratories to regularly test drinking water samples using methods evaluated and approved by EPA.
- Primary Enforcement Responsibility
- Information About Public Water Systems
- National Primary Drinking Water Regulations
- Approved Methods for Testing Drinking Water Samples
- Drinking Water Data
If your household is supplied by a private drinking water well, rather than a public water system, you may contact your state program for guidance or directly contact a certified laboratory to pay to have your private well tested.
EPA approves laboratories to test samples for the Unregulated Contaminant Monitoring Rule.