Environmental Assessment > Laboratory Accreditation

Accreditation of Environmental Laboratories

Accreditation of environmental laboratories is important to ensuring the accuracy and defensibility of analytical data. Accreditation is ruled by Chapter 173-50 WAC and includes accreditation of labs that analyze drinking water.

• How to become accredited and maintain your lab's accreditation
• Frequently asked questions
• Search for an accredited lab
• Contacts

Mailing address

Washington State Department of Ecology
Laboratory Accreditation Program
PO Box 488
Manchester, WA
98353-0488

Street address

Washington State Department of Ecology
Laboratory Accreditation Program
2350 Colchester Dr E
Manchester, WA
98353

Main Telephone Number

(360) 895-6144

FAX Number

(360) 895-6180