Southwest Health and Human Services
Lyon County
607 West Main Street, Suite 200, Marshall, MN 56258
Drinking-water tests for private wells (2)
BacteriaNitrate- Total coliform bacteria
- Nitrate (as N)
From the MDH list of accredited labs accepting private well samples (October 2026), checked 2026-11-03. For other contaminants, use the MDH accredited lab search.
Listed by the Minnesota Department of Health (MDH) as an accredited lab that accepts drinking-water samples from private well users. Listing checked 2026-11-03. Call the lab before sampling to confirm current accreditation, prices, sample bottles and holding times.