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Certified Drinking Water Analysis Laboratories by State

Arizona
Arizona Department of Health Services. Visit the Environmental Laboratory Licensure Program web site, and click on the Safe Drinking Water Commercial Laboratory list for commercial laboratories licensed by the Office of Laboratory Services to perform drinking water testing in Arizona.

Hawaii
Hawaii Department of Health (DOH), State Laboratories Division. Click here to get a PDF of the list of labs certified or approved by the DOH State Laboratories Division. Or visit the Safe Drinking Water Branch web site and look for Drinking Water Testing Labs.

California
Visit the California Department of Public Health web site's page on the Environmental Laboratory Accreditation Program (ELAP) and look for Certified Laboratory List. The information provided in the list is subject to change and may not be current. The list is periodically updated to reflect the changes based on information available in ELAP at that time.

Guam
The Guam Environmental Protection Agency, Drinking Water Laboratory
(671) 472-8863
Monitoring Services Division
Guam Environmental Protection Agency
15-6101 Mariner Avenue, Tiyan,
Barrigada, Guam 96913
(or mailing address: PO Box 22439 GMF, Barrigada, Guam 96921)

Nevada
Visit the Nevada Division of Environmental Protection web site's page on Environmental Laboratory Services and look for the Nevada Certified Lab List [Excel spreadsheet] in the list under Program Compliance.