7 named for arsenic itself on the list.
Per the state list or a state web page. Call to confirm.
Located outside Minnesota but on its list.
USGS estimate for Minnesota.
How many labs test for arsenic in Minnesota
18 labs on Minnesota's official drinking-water lab list are certified to test for arsenic. Of these, 7 are named for arsenic itself and 11 send it to another accredited lab. 18 of them are marked as taking samples from the public. They are listed first.
The list is published by the Minnesota Department of Health - MNELAP / Well Management. List version on file: October 2026. Fetched 2026-11-15 (UTC).
Minnesota labs certified for arsenic
Marked as taking public samples (18)
| Lab | Location | Arsenic certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| A.W. Research Laboratories, Inc. | Brainerd, MN | Named on the official list | Public samples: yes (per state) | Not on the list |
| AC Analytical & Consulting, LLC | Puposky, MN | Subcontracted: the lab sends arsenic to another accredited lab | Public samples: yes (per state) | Not on the list |
| EMSL Analytical, Inc. | New Hope, MN | Named on the official list | Public samples: yes (per state) | Not on the list |
| Engel Water Testing, Inc. | Minnetrista, MN | Subcontracted: the lab sends arsenic to another accredited lab | Public samples: yes (per state) | Not on the list |
| Instrumental Research, Inc. | Fridley, MN | Subcontracted: the lab sends arsenic to another accredited lab | Public samples: yes (per state) | Not on the list |
| Minnesota Valley Testing Laboratories, Inc. | New Ulm, MN | Named on the official list | Public samples: yes (per state) | Not on the list |
| Pace Analytical Services, LLC - Duluth | Duluth, MN | Subcontracted: the lab sends arsenic to another accredited lab | Public samples: yes (per state) | Not on the list |
| Pace Analytical Services, LLC - Minneapolis | Minneapolis, MN | Named on the official list | Public samples: yes (per state) | Not on the list |
| Pace Analytical Services, LLC - Virginia | Virginia, MN | Subcontracted: the lab sends arsenic to another accredited lab | Public samples: yes (per state) | Not on the list |
| RMB Environmental Laboratories, Inc. - Burnsville | Burnsville, MN | Subcontracted: the lab sends arsenic to another accredited lab | Public samples: yes (per state) | Not on the list |
| RMB Environmental Laboratories, Inc. - Virginia | Virginia, MN | Subcontracted: the lab sends arsenic to another accredited lab | Public samples: yes (per state) | Not on the list |
| RMB Environmental Laboratories, Inc. – Detroit Lakes | Detroit Lakes, MN | Named on the official list | Public samples: yes (per state) | Not on the list |
| RMB Environmental Laboratories, Inc. – Pequot Lakes | Pequot Lakes, MN | Subcontracted: the lab sends arsenic to another accredited lab | Public samples: yes (per state) | Not on the list |
| Southeastern Minnesota Water Analysis Laboratory | Rochester, MN | Subcontracted: the lab sends arsenic to another accredited lab | Public samples: yes (per state) | Not on the list |
| Traut Water Analysis Lab | St. Joseph, MN | Subcontracted: the lab sends arsenic to another accredited lab | Public samples: yes (per state) | Not on the list |
| Twin City Water Clinic, Inc. | Hopkins, MN | Named on the official list | Public samples: yes (per state) | Not on the list |
| UC Laboratory | Janesville, MN | Subcontracted: the lab sends arsenic to another accredited lab | Public samples: yes (per state) | Not on the list |
| Water Laboratories, Inc. | Elk River, MN | Named on the official list | Public samples: yes (per state) | Not on the list |
How the Minnesota list marks public samples (whole list). Every lab on this list accepts private-well samples.
Before you send a sample, call the lab to confirm it is currently certified for the exact test and method, that it accepts samples from homeowners, and how to collect and ship them. Status can change between list updates.
Why test for arsenic in Minnesota
Arsenic is invisible, tasteless and mostly natural, and it comes in two forms that respond very differently to treatment. Read our arsenic explainer.
Minnesota guidance that mentions arsenic:
- Coliform bacteria and nitrate every year. Arsenic, lead and manganese at least once. [1]
USGS estimates that the most private-well users with arsenic above 10 µg/L, EPA's limit for public water, live in Blue Earth County, St. Louis County and Anoka County (about 4,305 people in Blue Earth County, 2010 base year). USGS describes this kind of estimate as useful "for broad screening of the population at risk", so it says nothing certain about any one well. [2]
Show the numbers
| Item | Value | Note |
|---|---|---|
| Blue Earth County | 4,305 people (2010 base year) | |
| St. Louis County | 3,598 people (2010 base year) | |
| Anoka County | 2,983 people (2010 base year) | |
| Crow Wing County | 2,657 people (2010 base year) | |
| Nicollet County | 2,248 people (2010 base year) | |
| Sibley County | 2,193 people (2010 base year) |
USGS model estimate for broad screening, not a measurement of any well. Only a test tells you about your own well. Source: USGS, Estimated county level domestic well population with arsenic greater than 10 micrograms per liter (Ayotte, Medalie and Qi, 2017), accessed 2026-11-01.
About 1,176,917 people in Minnesota used private wells in 2015, by the USGS estimate of people on domestic self-supplied water. [3] Federal limits are written for public water systems, not private wells, so testing is up to the owner.
For tests that depend on your home (farms nearby, old plumbing, a new baby), use the which-tests checklist. When results arrive, check your numbers against EPA's limits. State guidance, county data and every lab: Minnesota.
Other tests in Minnesota
- Minnesota Department of Health, Well water testing tips
- USGS, Estimated county level domestic well population with arsenic greater than 10 micrograms per liter (Ayotte, Medalie and Qi, 2017)
- USGS, Estimated use of water in the United States, county-level data for 2015 (Dieter et al., ver. 2.0, 2018)
- MDH Accredited Labs in Minnesota Accepting Drinking Water Samples from Private Well Users (official list)
MDH Accredited Labs in Minnesota Accepting Drinking Water Samples from Private Well Users.
Official source