Water Testing Finder

Wisconsin directory

Wisconsin water testing laboratories

These listings are from the official Wisconsin certification list in this database snapshot. Wisconsin certification means the laboratory appears on that official list; a laboratory may be physically located outside Wisconsin. Certification does not confirm mail-in or residential service. Ask the lab before collecting a sample.

View the official source list

Labs for home testing: 67 · Plant and utility: 2

Choosing a test?

Decide what to ask for before you filter this list. Certification alone does not confirm that a lab accepts household samples.

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69 laboratories found

Labs for home testing (67)

Most listings do not confirm household service. Confirm with the lab before you collect a sample.

Plant and utility (2)

Official reference: EPA certified laboratory contacts. County health / Extension may offer cheap or free well tests.