privatewelldata / States / Minnesota
Minnesota well water testing
26 labs are listed on Minnesota’s official certified-lab list; 18% of 5,838 sampled wells were above the arsenic limit across 86 counties. Updated 2026-10-18.
Official lab list for Minnesota
Minnesota Department of Health – testing your wellMinnesota's health department covers which tests well owners should run and how to find an accredited lab that accepts household samples.www.health.state.mn.us · checked 2026-10-18Minnesota Department of HealthThis state agency certifies the labs that may test drinking water. Use its list to pick a certified lab for your well sample.eldo.web.health.state.mn.us · checked 2026-10-18 · link via EPA
Coverage map
Where the labs are
| Town | Labs |
|---|---|
| Minneapolis | 2 |
| Virginia | 2 |
| Alexandria | 1 |
| Bloomington | 1 |
| Brainerd | 1 |
| Burnsville | 1 |
| Detroit Lakes | 1 |
| Duluth | 1 |
| Elk River | 1 |
| Fridley | 1 |
| Hopkins | 1 |
| International Falls | 1 |
| Janesville | 1 |
| Marshall | 1 |
| Minnetrista | 1 |
| New Hope | 1 |
| New Ulm | 1 |
| Pequot Lakes | 1 |
| Preston | 1 |
| Puposky | 1 |
| Red Wing | 1 |
| Rochester | 1 |
| St. Joseph | 1 |
| Worthington | 1 |
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Tests these labs are listed for
- Bacteria (coliform / E. coli): 24 of 26 labs
- Nitrate / nitrite: 21 of 26 labs
- Arsenic: 20 of 26 labs
- Lead: 19 of 26 labs
- Metals: 14 of 26 labs
Counted from the tests each lab is certified for on the official list. A lab may offer more; ask before you send a sample.
Well water results by county
| County | Arsenic > 10 µg/L | Nitrate > 10 mg/L |
|---|---|---|
| Aitkin County | 12% of 104 | 6% of 35 |
| Anoka County | 16% of 145 | 1% of 305 |
| Becker County | 37% of 114 | 7% of 86 |
| Beltrami County | 15% of 68 | 0% of 81 |
| Benton County | 2% of 90 | 11% of 114 |
| Big Stone County | – | 3% of 31 |
| Blue Earth County | 26% of 121 | 8% of 222 |
| Brown County | 32% of 100 | 0% of 12 |
| Carlton County | 9% of 130 | 0% of 157 |
| Cass County | 9% of 129 | 0% of 61 |
| Chippewa County | – | 5% of 22 |
| Chisago County | 6% of 96 | 1% of 105 |
| Clay County | 51% of 100 | 2% of 125 |
| Clearwater County | 33% of 15 | 0% of 27 |
| Cook County | 0% of 10 | 0% of 23 |
| Cottonwood County | 36% of 11 | 9% of 46 |
| Crow Wing County | 6% of 136 | 6% of 179 |
| Dakota County | 5% of 191 | 10% of 207 |
| Dodge County | 2% of 102 | 11% of 18 |
| Douglas County | 38% of 45 | 10% of 80 |
| Faribault County | 19% of 16 | 4% of 26 |
| Fillmore County | 0% of 15 | 9% of 107 |
| Freeborn County | 60% of 10 | 0% of 24 |
| Goodhue County | 3% of 31 | 5% of 174 |
| Grant County | 93% of 14 | 3% of 30 |
| Hennepin County | 14% of 213 | 2% of 303 |
| Houston County | 0% of 92 | 0% of 58 |
| Hubbard County | 6% of 109 | 13% of 115 |
| Isanti County | 9% of 111 | 30% of 50 |
| Itasca County | 11% of 37 | 1% of 98 |
| Jackson County | 67% of 15 | 2% of 41 |
| Kanabec County | 5% of 97 | 4% of 23 |
| Kandiyohi County | 38% of 101 | 15% of 41 |
| Kittson County | – | 13% of 47 |
| Koochiching County | – | 0% of 31 |
| Lac qui Parle County | 16% of 97 | 3% of 29 |
| Lake County | 2% of 114 | 0% of 47 |
| Lake of the Woods County | – | 6% of 18 |
| Le Sueur County | 38% of 13 | 0% of 19 |
| Lincoln County | 0% of 12 | 13% of 32 |
| Lyon County | 50% of 10 | 3% of 58 |
| Mahnomen County | – | 0% of 19 |
| Marshall County | 40% of 10 | 9% of 58 |
| Martin County | 12% of 17 | 0% of 16 |
| McLeod County | 56% of 79 | 0% of 86 |
| Meeker County | 46% of 94 | 6% of 17 |
| Mille Lacs County | – | 2% of 47 |
| Morrison County | 5% of 129 | 12% of 85 |
| Mower County | 9% of 23 | 1% of 113 |
| Murray County | 36% of 11 | 12% of 34 |
| Nicollet County | 25% of 106 | 3% of 115 |
| Nobles County | 23% of 78 | 10% of 62 |
| Norman County | – | 12% of 17 |
| Olmsted County | 1% of 141 | 4% of 101 |
| Otter Tail County | 31% of 229 | 14% of 263 |
| Pennington County | – | 7% of 15 |
| Pine County | 9% of 74 | 1% of 137 |
| Pipestone County | – | 22% of 18 |
| Polk County | 50% of 18 | 11% of 82 |
| Pope County | 48% of 84 | 8% of 167 |
| Ramsey County | 9% of 33 | 0% of 87 |
| Red Lake County | – | 0% of 11 |
| Redwood County | 31% of 127 | 7% of 101 |
| Renville County | 29% of 102 | 4% of 135 |
| Rice County | 45% of 76 | 0% of 96 |
| Rock County | 8% of 53 | 17% of 41 |
| Roseau County | 40% of 15 | 7% of 55 |
| Scott County | 25% of 28 | 2% of 59 |
| Sherburne County | 6% of 145 | 15% of 228 |
| Sibley County | 42% of 103 | 1% of 106 |
| St. Louis County | 8% of 287 | 1% of 165 |
| Stearns County | 32% of 162 | 20% of 327 |
| Steele County | 9% of 101 | 0% of 22 |
| Stevens County | 76% of 17 | 2% of 45 |
| Swift County | – | 2% of 58 |
| Todd County | 22% of 111 | 6% of 150 |
| Traverse County | 31% of 13 | 4% of 28 |
| Wabasha County | 10% of 21 | 3% of 109 |
| Wadena County | 5% of 106 | 14% of 92 |
| Waseca County | 17% of 12 | 0% of 12 |
| Washington County | 2% of 164 | 1% of 190 |
| Watonwan County | 25% of 20 | 3% of 32 |
| Wilkin County | 50% of 10 | 0% of 38 |
| Winona County | 1% of 97 | 4% of 23 |
| Wright County | 35% of 110 | 0% of 128 |
| Yellow Medicine County | 17% of 18 | 6% of 70 |
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Nitrate: 6% of 7,167 sampled wells statewide. All Minnesota counties →
Labs on the Minnesota Department of Health list
- Steven M. Traut Wells, Inc., AlexandriaListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Tri-City/William Lloyd Analytical Lab, BloomingtonListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- A.W. Research Laboratories, Inc., BrainerdListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- RMB Environmental Laboratories, Inc. - Burnsville, BurnsvilleListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- RMB Environmental Laboratories, Inc. – Detroit Lakes, Detroit LakesListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Pace Analytical Services, LLC - Duluth, DuluthListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Water Laboratories, Inc., Elk RiverListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Instrumental Research, Inc., FridleyListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Twin City Water Clinic, Inc., HopkinsListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Koochiching Health Department Water Testing, International FallsListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- UC Laboratory, JanesvilleListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Southwest Health and Human Services, MarshallListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Pace Analytical Services, LLC - Minneapolis, MinneapolisListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Engel Water Testing, Inc., MinnetristaListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- EMSL Analytical, Inc., New HopeListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Minnesota Valley Testing Laboratories, Inc., New UlmListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- RMB Environmental Laboratories, Inc. – Pequot Lakes, Pequot LakesListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Fillmore SWCD Water Quality Laboratory, PrestonListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- AC Analytical & Consulting, LLC, PuposkyListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Red Wing City Laboratory, Red WingListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Southeastern Minnesota Water Analysis Laboratory, RochesterListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Traut Water Analysis Lab, St. JosephListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Pace Analytical Services, LLC - Virginia, VirginiaListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- RMB Environmental Laboratories, Inc. - Virginia, VirginiaListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
- Worthington Public Utilities Laboratory, WorthingtonListed in Minnesota Department of Health’s certified lab list. See the official list → (checked 2026-10-16)
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See all 1 Minnesota lab listings →
How to choose a lab
- Pick a lab on the official list above that is certified for each test you need (bacteria and chemistry are often separate certifications).
- Ask for the lab’s own sample bottles and instructions; bacteria samples usually must reach the lab within 24–30 hours.
- Compare prices for a basic package (bacteria, nitrate, pH/TDS) and add arsenic or other metals where local data shows a risk.
- Be wary of free in-home tests from treatment-system sellers — see our salesperson checklist.
Questions
Where can I get my well water tested in Minnesota?
Use a lab on Minnesota’s official certified-lab list. We count 26 listed labs (excluding those marked as serving public water systems only), most in Minneapolis, Virginia, Alexandria. Confirm the lab is certified for the exact tests you need before you send a sample.
What should I test my well for in Minnesota?
Test every year for bacteria (total coliform and E. coli), nitrate, pH and total dissolved solids (CDC). In Minnesota, 18% of sampled wells with arsenic data were above the EPA limit, so include arsenic. Use our test helper for a list that fits your home.
Is there well water data for my county in Minnesota?
Yes for 86 counties: we show the share of sampled wells above the EPA arsenic and nitrate limits, from the Water Quality Portal (USGS/EPA). These are monitoring wells as well as private wells, so test your own well.