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Well Diagnosis

Lab inventory · MN · Updated October 12, 2026

Minnesota Certified Well Water Labs

Direct answer

This is the minnesota certified-lab inventory for private-well owners. Use the official search first, then a lab that takes a residential sample. Bacteria or nitrate still goes to the health department.

What to test
What to testWhyEPA MCL / SMCL or guidance
Total coliformCDC’s annual floor for a private well. A present result is a pathway warning, not a shopping trip.Present/absent — any detected coliform is a positive until a clean retest CDC well-testing guidelines
Nitrate as NSame yearly panel as coliform. A result at or above the public-system line goes to the health department.10 mg/L as N (EPA public-system MCL) EPA National Primary Drinking Water Regulations
pHCDC annual floor. Low pH is a corrosion clue, not an iron-filter job.6.5–8.5 SMCL (aesthetic guideline) EPA secondary standards
Total dissolved solidsCDC annual floor with coliform, nitrate, and pH.500 mg/L SMCL (aesthetic guideline) EPA secondary standards

A working inventory of MDH-accredited laboratories that accept private-well samples. Confirm current drinking-water accreditation in the live ELDO search before you mail a bottle.

This page is a directory, not a ranking and not medical advice. Minnesota Department of Health accredits laboratories through MNELAP. The July 2026 table “Accredited Labs in Minnesota Accepting Drinking Water Samples from Private Well Users” is a snapshot of labs that take homeowner bottles for coliform, nitrate, arsenic, lead, and/or manganese. Accreditation is by analyte and it lapses. Re-check ELDO before you pay. MDH’s Well Testing, Results, and Options page — and the March 11, 2024 press note on the same five contaminants — tells private-well owners to test coliform bacteria and nitrate every year, and arsenic, lead, and manganese at least once (manganese especially before a baby drinks the water). Those are MDH’s published cadence, not a diagnosis on this page. MDH’s published manganese guidance numbers on that tips page are above 100 µg/L for infants under one year and above 300 µg/L for everyone else. If coliform or nitrate fails, take the sheet to the health department. For rotten-egg odor, the hot-versus-cold split, and MDH’s carbon / oxidizing-media classes, use Hydrogen Sulfide in Minnesota Well Water. For the 0.3 mg/L aesthetic line, ferrous/ferric/organic forms, and iron-bacteria slime, use Iron in Minnesota Well Water. For the 10 mg/L as N public-system comparison, the ~3 mg/L human-influence follow-up, and MDA Township Testing context, use Nitrates in Minnesota Well Water. For the 100 / 300 µg/L comparison and treatment classes after the sheet, use the Manganese in Minnesota Well Water guide — not a filter brand. For the invisible-glass arsenic split, the 10 µg/L public-system comparison, and MDH’s “at least once” cadence, use Arsenic in Minnesota Well Water. For hardness as CaCO3, MDH’s 50 / 120 mg/L teaching lines, and why a softener waits on iron and manganese, use Hardness in Minnesota Well Water. MDH’s published five-contaminant cadence does not include PFAS. If you add a PFAS panel, confirm that analyte in ELDO — it is not a yearly Minnesota statute. For how EPA’s public-system PFAS numbers compare to a private-well sheet, use the PFAS in private well water guide. Well Diagnosis does not run a kit program and does not certify laboratories.

News for MN well ownersPFAS in private well waterHydrogen Sulfide in Minnesota Well WaterIron in Minnesota Well WaterNitrates in Minnesota Well WaterManganese in Minnesota Well WaterArsenic in Minnesota Well WaterHardness in Minnesota Well WaterMichigan certified labsNorth Carolina certified labs

Official search first

Open MDH Search for Accredited Laboratories (ELDO; health.state.mn.us/labsearch also lands here). Choose Customized Searches. Set Program to Safe Drinking Water Program. Pick the analyte you need. At the bottom of the page, check “Accepts samples from private homeowners,” then Search. The list is labs currently accredited for that field that say they take a homeowner bottle. Then call about bottles, hold times, and whether a Friday bacteria sample can arrive inside the hold time. The July 2026 PDF map/table is a useful geographic snapshot, not a live certificate. A star on that table means the lab publishes a courier or drop-off network — contact the lab; this page does not invent those sites. An asterisk means the lab subcontracts that analyte to another accredited bench. Confirm current fields in ELDO or with MNELAP at 651-201-5324 before you mail a sample.

MDH Search for Accredited Laboratories (ELDO)

Labs that take private-well work

Listing here is not a certification. Phone the lab, ask for current drinking-water fields of accreditation, hold times, and whether they want a Friday bacteria sample. If the result is coliform or nitrate, take the sheet to your health department.

  • Rochester · Olmsted / southeastern Minnesota

    Private wells: yes

    Southeastern Minnesota Water Analysis Laboratory

    2100 Campus Drive SE, Suite 100, Rochester, MN 55904

    507-328-7495

    July 2026 MDH table map number 2. The table marks total coliform and nitrate as N in-house, and arsenic, lead, and manganese as subcontracted (*). A star on that table means the lab publishes a courier or drop-off network — ask the lab; do not invent a site from this page.

    Listing here is not a certificate. Confirm current Safe Drinking Water fields in ELDO and call before you mail a bottle. If coliform or nitrate fails, take the sheet to the health department. This site is not medical advice.

    Lab website · MDH July 2026 accredited-labs table (labmap.pdf)

  • New Ulm · Brown / southern Minnesota

    Private wells: yes

    Minnesota Valley Testing Laboratories, Inc.

    1126 North Front Street, New Ulm, MN 56073

    507-354-8517

    July 2026 MDH table map number 6. The table marks total coliform, nitrate as N, arsenic, lead, and manganese in-house (no asterisk).

    Confirm current fields in ELDO before you order. A table row is not a live certificate. Call about bottles and hold times.

    Lab website · MDH July 2026 accredited-labs table (labmap.pdf)

  • Burnsville · Hennepin / Twin Cities

    Private wells: yes

    RMB Environmental Laboratories, Inc. - Burnsville

    501 Highway 13 E, Suite 104, Burnsville, MN 55337

    952-456-8470

    July 2026 MDH table map number 8. The table marks total coliform and nitrate as N in-house, and arsenic, lead, and manganese as subcontracted (*). Starred for a courier or drop-off network — contact the lab for sites.

    Re-check ELDO. Do not assume the subcontracted metals sit on the same bench as the bacteria bottle.

    Lab website · MDH July 2026 accredited-labs table (labmap.pdf)

  • Hopkins · Hennepin / Twin Cities

    Private wells: yes

    Twin City Water Clinic, Inc.

    617 13th Avenue S, Hopkins, MN 55343

    952-935-3556

    July 2026 MDH table map number 10. The table marks total coliform, nitrate as N, arsenic, and lead in-house, and manganese as subcontracted (*).

    Confirm the manganese path in ELDO if that is the analyte you need. Call before you mail a Friday bacteria sample.

    Lab website · MDH July 2026 accredited-labs table (labmap.pdf)

  • Minneapolis · Hennepin / Twin Cities

    Private wells: yes

    Pace Analytical Services, LLC - Minneapolis

    1700 Elm Street SE, Suite 200, Minneapolis, MN 55414

    612-607-1700

    July 2026 MDH table map number 12. The table marks total coliform, nitrate as N, arsenic, lead, and manganese in-house (no asterisk).

    A commercial multi-site name is not a certificate. Confirm this Minneapolis location still takes a private-well bottle and that the fields are current in ELDO.

    Lab website · MDH July 2026 accredited-labs table (labmap.pdf)

  • New Hope · Hennepin / Twin Cities

    Private wells: yes

    EMSL Analytical, Inc.

    3410 Winnetka Avenue N, New Hope, MN 55427

    763-449-4922

    July 2026 MDH table map number 13. The table marks total coliform, nitrate as N, arsenic, lead, and manganese in-house (no asterisk).

    Confirm they still accept a homeowner sample. Use ELDO, not a national directory, as the Minnesota drinking-water certificate.

    Lab website · MDH July 2026 accredited-labs table (labmap.pdf)

  • Elk River · Sherburne / north of the Twin Cities

    Private wells: yes

    Water Laboratories, Inc.

    333 Main Street NW, Elk River, MN 55330

    763-441-7509

    July 2026 MDH table map number 15. The table marks total coliform, nitrate as N, arsenic, and lead. Manganese is not marked on that row.

    If you need manganese, use ELDO or another lab the July 2026 table marks for that analyte. Call before you assume a five-contaminant panel.

    Lab website · MDH July 2026 accredited-labs table (labmap.pdf)

  • Brainerd · Crow Wing / northern Minnesota

    Private wells: yes

    A.W. Research Laboratories, Inc.

    314 Charles Street, Brainerd, MN 56401

    218-829-7974

    July 2026 MDH table map number 18. The table marks total coliform, nitrate as N, arsenic, lead, and manganese in-house. Starred for a courier or drop-off network — contact the lab; this page does not list those sites.

    Confirm current fields in ELDO. Hours and accepted sample types change.

    Lab website · MDH July 2026 accredited-labs table (labmap.pdf)

  • Detroit Lakes · Becker / northwestern Minnesota

    Private wells: yes

    RMB Environmental Laboratories, Inc. – Detroit Lakes

    22796 County Highway 6, Detroit Lakes, MN 56501

    218-846-1465

    July 2026 MDH table map number 19. The table marks total coliform, nitrate as N, arsenic, lead, and manganese in-house. Starred for a courier or drop-off network — ask the lab for current sites.

    This is a different bench from the Burnsville RMB row. Confirm which location is taking your bottle and which fields are current.

    Lab website · MDH July 2026 accredited-labs table (labmap.pdf)

  • Duluth · St. Louis / northeastern Minnesota

    Private wells: yes

    Pace Analytical Services, LLC - Duluth

    4730 Oneota Street, Duluth, MN 55807

    218-727-6380

    July 2026 MDH table map number 20. The table marks total coliform and nitrate as N in-house, and arsenic, lead, and manganese as subcontracted (*).

    The July 2026 table also lists a Pace Virginia row under the same Duluth phone. Confirm which bench and which fields you are ordering. Re-check ELDO.

    Lab website · MDH July 2026 accredited-labs table (labmap.pdf)

  • Preston · Fillmore / southeastern Minnesota · bacteria only on the July 2026 table

    Private wells: yes

    Fillmore SWCD Water Quality Laboratory

    900 Washington Street NW, Preston, MN 55965

    507-765-3878

    July 2026 MDH table map number 1. The table marks total coliform only. Nitrate, arsenic, lead, and manganese are blank on that row.

    Bacteria-only on the July 2026 snapshot. Confirm chemistry at a lab the table marks for those analytes, or in the live ELDO search. If coliform is present, call the health department. This site is not medical advice.

    Lab website · MDH July 2026 accredited-labs table (labmap.pdf)

MDH / private-well contacts

These numbers are printed on the July 2026 labmap PDF and on MDH’s well-testing pages. They are the health-department path, not a shopping-cart kit. County environmental or public health offices often hand out bottles or run a local drop-off — start there when that path exists. Hours change; call before you drive. After the sheet comes back, use the Manganese in Minnesota Well Water guide for the 100 / 300 µg/L comparison, then the lab-report guide on this site.

OfficeCounties servedPhone
MDH Water Policy Center / private wellsStatewide private-well questions · health.privatewells@state.mn.us · health.state.mn.us/wellwater651-201-5594
MNELAP (accreditation questions)Statewide: confirm a lab’s current drinking-water fields · health.mnelap@state.mn.us651-201-5324
County environmental / public healthLocal bottles, drop-off, and follow-up when the county offers that path — ask before you mailSee county environmental or public health listing

Contaminant and parent pages

Related

See also the homepage, certified labs by state, well water test kits, how to read a lab report, and MN lab news.

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