Well water testing labs in Minnesota

Last verified October 26, 2026 against the official state list (October 2026).

Minnesota publishes an official list of accredited labs that accept drinking water samples from private well owners. We copied it below, sorted by county, so you can find a lab near you and see which of the five common tests each lab runs.

1.2 million Minnesotans get their drinking water from a private well, according to the Minnesota Department of Health.

Labs by county

Anoka Becker Beltrami Brown Crow Wing Douglas Fillmore Goodhue Hennepin Koochiching Lyon Nobles Olmsted Sherburne St. Louis Stearns Waseca

Anoka County

Instrumental Research, Inc.

7800 Main Street NE
Fridley, MN 55432

763-571-3698

Total coliform bacteria
Nitrate
Arsenic (subcontracted)
Lead (subcontracted)

Becker County

RMB Environmental Laboratories, Inc. - Detroit Lakes

22796 County Highway 6
Detroit Lakes, MN 56501

218-846-1465

Total coliform bacteria
Nitrate
Arsenic
Lead
Manganese

Beltrami County

AC Analytical & Consulting, LLC

21518 Basset Drive NW
Puposky, MN 56667

218-243-3328

Total coliform bacteria
Nitrate
Arsenic (subcontracted)
Lead (subcontracted)

Brown County

Minnesota Valley Testing Laboratories, Inc.

1126 North Front Street
New Ulm, MN 56073

507-354-8517

Total coliform bacteria
Nitrate
Arsenic
Lead
Manganese

Crow Wing County

A.W. Research Laboratories, Inc.

314 Charles Street
Brainerd, MN 56401

218-829-7974

Total coliform bacteria
Nitrate
Arsenic
Lead
Manganese

RMB Environmental Laboratories, Inc. - Pequot Lakes

30968 S. Washington Avenue
Pequot Lakes, MN 56472

218-828-2118

Total coliform bacteria
Nitrate (subcontracted)
Arsenic (subcontracted)
Lead (subcontracted)
Manganese (subcontracted)

Douglas County

Steven M. Traut Wells, Inc.

754 Cross Country Lane SW
Alexandria, MN 56308

320-762-1528

Total coliform bacteria
Nitrate
Arsenic (subcontracted)
Lead (subcontracted)

Fillmore County

Fillmore SWCD Water Quality Laboratory

900 Washington Street NW
Preston, MN 55965

507-765-3878

Total coliform bacteria

Goodhue County

Red Wing City Laboratory

1020 East Fifth Street
Red Wing, MN 55066

651-385-5143

Total coliform bacteria

Hennepin County

RMB Environmental Laboratories, Inc. - Burnsville

501 Highway 13 E, Suite 104
Burnsville, MN 55337

952-456-8470

Total coliform bacteria
Nitrate
Arsenic (subcontracted)
Lead (subcontracted)
Manganese (subcontracted)

Tri-City/William Lloyd Analytical Lab

9300 Poplar Bridge Road
Bloomington, MN 55437

952-563-4904

Total coliform bacteria
Nitrate
Arsenic
Manganese

Twin City Water Clinic, Inc.

617 13th Avenue S
Hopkins, MN 55343

952-935-3556

Total coliform bacteria
Nitrate
Arsenic
Lead
Manganese (subcontracted)

Engel Water Testing, Inc.

9300 County Road 15
Minnetrista, MN 55359

952-955-1800

Total coliform bacteria
Nitrate (subcontracted)
Arsenic (subcontracted)
Lead (subcontracted)

Pace Analytical Services, LLC - Minneapolis

1700 Elm Street SE, Suite 200
Minneapolis, MN 55414

612-607-1700

Total coliform bacteria
Nitrate
Arsenic
Lead
Manganese

EMSL Analytical, Inc.

3410 Winnetka Avenue N
New Hope, MN 55427

763-449-4922

Total coliform bacteria
Nitrate
Arsenic
Lead
Manganese

Koochiching County

Koochiching Health Department Water Testing

1000 Fifth Street
International Falls, MN 56649

218-283-7070

Total coliform bacteria

Lyon County

Southwest Health and Human Services

607 West Main Street, Suite 200
Marshall, MN 56258

507-537-6713

Total coliform bacteria
Nitrate

Nobles County

Worthington Public Utilities Laboratory

1950 27th Street N
Worthington, MN 56187

507-372-8660

Total coliform bacteria

Olmsted County

Southeastern Minnesota Water Analysis Laboratory

2100 Campus Drive SE, Suite 100
Rochester, MN 55904

507-328-7495

Total coliform bacteria
Nitrate
Arsenic (subcontracted)
Lead (subcontracted)
Manganese (subcontracted)

Sherburne County

Water Laboratories, Inc.

333 Main Street NW
Elk River, MN 55330

763-441-7509

Total coliform bacteria
Nitrate
Arsenic
Lead

St. Louis County

Pace Analytical Services, LLC - Duluth

4730 Oneota Street
Duluth, MN 55807

218-727-6380

Total coliform bacteria
Nitrate
Arsenic (subcontracted)
Lead (subcontracted)
Manganese (subcontracted)

RMB Environmental Laboratories, Inc. - Virginia

110 1/2 South 15th Avenue W
Virginia, MN 55792

218-440-2043

Total coliform bacteria
Nitrate
Arsenic (subcontracted)
Lead (subcontracted)
Manganese (subcontracted)

Pace Analytical Services, LLC - Virginia

315 Chestnut Street
Virginia, MN 55792

218-727-6380

Total coliform bacteria
Nitrate (subcontracted)
Arsenic (subcontracted)
Lead (subcontracted)
Manganese (subcontracted)

Stearns County

Traut Water Analysis Lab

32640 County Road 133
St. Joseph, MN 56374

320-251-5090

Total coliform bacteria
Nitrate
Arsenic (subcontracted)
Lead (subcontracted)

Waseca County

UC Laboratory

129 North Main Street
Janesville, MN 56048

507-234-5835

Total coliform bacteria
Nitrate
Arsenic (subcontracted)
Lead (subcontracted)
Manganese

“(subcontracted)” means: Sample is subcontracted to a lab accredited for that test. Manganese is left off where the state list shows no mark.

Notes on this list

The state list says these labs held valid accreditation when the list was made, and that other accredited labs may not appear on it.
County is shown as printed on the state list.
For any other contaminant, the state's lab search lets you filter for labs that accept samples from private homeowners.

What the state recommends

MDH says you are responsible for regularly testing your well water, and recommends using an accredited laboratory. Contact a lab for sample containers and instructions, or ask your county environmental or public health services whether they offer well testing. Source
For a new well, MDH says the licensed well contractor collects an initial sample to test for coliform bacteria, nitrate, and arsenic before you use the water for drinking or cooking. Source

State contacts

MDH Well Management Section: 651-201-4600 or 800-383-9808, health.wells@state.mn.us Source
MDH Water Policy Center (publisher of the lab list): 651-201-5594, health.privatewells@state.mn.us Source
MNELAP (questions about a lab's accreditation): 651-201-5324, health.mnelap@state.mn.us Source

Questions

Where can I get my well water tested in Minnesota?

The Minnesota Department of Health lists 25 accredited labs that accept samples from private well owners (October 2026 edition). They are listed by county on this page. Some county health departments also offer testing.

Which labs in Minnesota test well water for arsenic?

On the state list, 20 labs offer arsenic testing. At some of them the sample is subcontracted to another accredited lab. The table marks each one.

How do I find a lab for a contaminant not on this list?

Use MDH's Search for Accredited Laboratories. Choose the Safe Drinking Water Program and the analyte, then tick 'Accepts samples from private homeowners'.

Sources

Other states

Well water testing labs in Texas · Well water testing labs in Vermont