Skip to main content

Laboratory Accreditation

Certification & Registration

The DNR accredits laboratories to perform aqueous (non-potable water), solid, and drinking water (potable water) testing for many of the agency's environmental programs. Accreditation is available as a certified laboratory (can perform testing on compliance samples for other facilities) and as a registered laboratory (performs testing on their own samples only).

Certified Lab Lists

All of the lists below are current as of 2020

PFAS Certification

Application information specific to WI Perfluoroalkyl and polyfluoroalkyl substances (PFAS) Certification

Applications for Registration and Certification

Application information for registration and certification in WI to perform chemistry, radiochemistry, and asbestos tes


Resources related to laboratory testing training

Private Well Testing

Resources to help you determine what testing you want performed on your private well

Proficiency Testing

PT requirements, PT grading, PT provider and PT method code

Spreadsheets, Forms and Document Templates

Template resources to help with laboratory testing

Program Details

Administrative Code references and background program details

Method Detection Limit (MDL)

Resources dedicated to MDL determinations
Method Detection Limit (MDL)

Laboratory Standards Review Council

Council Meeting Announcements and minutes
Laboratory Standards Review Council

Analyte Groups Definitions

For some classes of compounds WI offers certification for the entire class. These are referred to as analyte groups an
Analyte Groups Definitions

Annual Renewal

Registration and certification requirements for annual renewal
Annual Renewal

Lab of the Year Award

Past award winners and a description about the award
Lab of the Year Award