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Well Water Testing · Benson, MN

Water testing in Benson

Water testing for Minnesota homes, above all those on a private well. An accredited laboratory tests the water for coliform bacteria and E. coli…

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Benson · Swift County

Well Water Testing in Benson

Water testing for Minnesota homes, above all those on a private well. An accredited laboratory tests the water for coliform bacteria and E. coli, nitrate, arsenic, lead, manganese, VOCs (volatile organic compounds), DRO (diesel range organics), iron, hardness, pH, fluoride, sulfate and uranium. The Minnesota Department of Health recommends testing a private well for coliform bacteria every year, nitrate every other year, and arsenic and lead at least once.

Benson is a Chippewa River county seat of early-1900s and postwar homes. Housing here runs to early-1900s and postwar county-seat homes, across the older core and postwar edges.

Questions about a Benson home?  ·  Call or text (612) 457-1634

Well water in Swift County

MDA's township testing schedule lists a Swift County report from 2019-2020, covering Appleton, Clontarf, Edison, Fairfield, Hegbert, Marysland, Moyer, Shible, Six Mile Grove, Tara and Westbank townships. MDA's published catalog entries give the townships and years but not well counts or percentages, so there is no county nitrate percentage to quote here. MDH says about 10 percent of Minnesota private wells exceed 10 ug/L arsenic, with the most detections in central and west central Minnesota.

County facts checked October 2026 against: wrl.mnpals.net, mda.state.mn.us, Minnesota Department of Health, Minnesota Department of Health.

See all Benson inspections →  ·  More about well water testing →  ·  Every water test, explained →

Water tests available in Benson

Bacteria

Shows whether surface water or waste is reaching the well.

  • Total coliform bacteria
    Surface contamination reaching the well
    None should be present (MDH)
  • E. coli
    Fecal contamination from septic, manure or wildlife
    None should be present (MDH)

Health chemicals

No taste, color or smell. These are the long-term health checks.

  • Nitrate
    Fertilizer, septic and manure; highest risk to infants
    10 mg/L (EPA)
  • Arsenic
    Natural arsenic from Minnesota rock and soil
    10 µg/L (EPA)
  • Lead
    Lead service lines, solder and brass fixtures
    No safe level (MDH)
  • Manganese
    Natural manganese; a concern for infants
    100 µg/L for infants (MDH guidance)
  • Fluoride
    Natural fluoride; dental health
    4.0 mg/L (EPA)
  • Uranium
    Natural radionuclide in groundwater
    30 µg/L (EPA)

Petroleum & solvents

Fuel and chemical spills from old tanks or nearby sites.

  • VOCs (volatile organic compounds)
    Fuels, solvents, degreasers and paints
    Varies by compound (EPA)
  • DRO (diesel range organics)
    Diesel and heating-oil petroleum
    No limit of its own; a petroleum screen (MPCA)

Household quality

Staining, scale and taste, and choosing the right treatment.

  • Iron
    Rusty staining and metallic taste
    0.3 mg/L, aesthetic (MDH)
  • Hardness
    Scale buildup; sizing a water softener
    No health standard
  • pH
    Corrosive or scaling water
    6.5 to 8.5, aesthetic (EPA)
  • Sulfate
    Taste and odor; diarrhea risk for infants
    250 mg/L, aesthetic (EPA)

Limits from MDH, EPA and MPCA. Your lab report compares each result to these values.

Benson private well testing timeline

Minnesota Department of Health schedule: coliform bacteria every year, nitrate every other year, arsenic and lead at least once. Source: MDH
TestYear 1Year 2Year 3Year 4Year 5Year 6
Coliform bacteria
Nitrate
Arsenic
Lead

Test again any time after flooding, after work on the well, or when the water's taste, color or smell changes, and always when you buy a home with a well.

Water testing in Benson: what matters

Benson, MN water testing: well cap near a lake cabin in Minnesota spring green
Coliform bacteria: MDH recommends testing every year →
Old hand pump next to a modern well cap in Minnesota winter snow (Swift County, Minnesota)
Nitrate: EPA limit 10 mg/L, highest risk to infants →
Benson, MN water testing: water sample bottles in a small cooler with ice packs at a Minnesota basement utility sink
Arsenic: about 10% of Minnesota wells exceed the standard →

How deep Benson wells go

15 ftsand and gravel (most wells)sandstone and limestone (SE and east central, incl. Twin Cities)1,000+ ft · fractured rock such as granite (NE)
Source: MDH Well Owner's Handbook

Depth and aquifer change what is in the water. Test the well you are buying, not the neighbor's. Get a free instant quote

Arsenic in Benson private wells, out of every 100

About 40 in 100 have some arsenic About 10 in 100 are above the 10 µg/L standard

Source: Minnesota Department of Health

You can't see, smell or taste arsenic. One lab test tells you where the well stands. Get a free instant quote

Questions

Common questions.

Who needs well water testing?
Any home on a private well, and above all when you are buying one. A private well is not regulated like a city water system, so the owner is responsible for knowing what is in the water. Testing before closing tells you whether the water needs treatment while you can still ask questions or negotiate.
What does the water panel cover?
The panel covers coliform bacteria and E. coli, nitrate, arsenic, lead, manganese, VOCs (volatile organic compounds), DRO (diesel range organics), iron, hardness, pH, fluoride, sulfate and uranium. Bacteria and nitrate are the short-term health checks. Arsenic, lead, manganese and uranium are the ones you cannot see or taste. VOCs and DRO screen for solvents and petroleum, such as fuel from an old oil tank or a nearby leak site. Iron, hardness, pH and sulfate explain staining, scale, odor and wear on plumbing and appliances.
How often should a well be tested?
The Minnesota Department of Health recommends coliform bacteria every year, nitrate every other year, and arsenic and lead at least once. Test again after flooding, after any work on the well, or if the taste, color or smell of the water changes.
Is well water testing part of the home inspection?
It is an add-on. Add it to your home inspection quote. Testing early in your inspection window leaves time to act on the results.
Has Swift County been part of the state's nitrate well testing?
Yes. MDA's schedule lists Swift County sampling in 2019 and 2020 across eleven townships, from Appleton to Westbank. The published entries do not give a percentage over 10 mg/L, so we do not quote one. If your township was not sampled, an accredited lab nitrate result on your well is the way to check.
My home is on city water. Is water testing still worth it?
Often yes. Community water systems follow EPA testing rules and report results in an annual Consumer Confidence Report, but that report does not measure your own plumbing. MDH and EPA say lead enters mainly from service lines and plumbing materials, and the only way to know is a tap test. MDH recommends an accredited lab, and your utility can say whether your home has a lead service line.
When should a home be tested for DRO or VOCs?
MDH suggests considering a VOC test when a well is near fuel tanks or a commercial or industrial area. MPCA reports petroleum has leaked at about 22,000 Minnesota sites, including home heating-oil tanks, and releases can threaten drinking water and send vapors into buildings. Reasons to test include a nearby leak site, a former or buried fuel tank, or a fuel odor or sheen. MPCA's leaking-tank-site database shows reported releases.
Do you cover Benson?
Yes — the county seat's older and postwar stock both get a full local inspection.
How do you get rid of coliform bacteria in a well?
The usual method is shock chlorination, also called well disinfection. A licensed well contractor can do it, or owners can follow the MDH well disinfection instructions. Afterward, have an accredited lab retest the water. MDH suggests retesting again about two to four weeks later because coliform can regrow, and repeating disinfection if it returns.
Does boiling water remove nitrate?
No. MDH warns that boiling makes nitrate more concentrated because water evaporates and the nitrate stays behind. If your well is above 10 mg/L, use bottled water or another safe alternative for drinking and for infant formula, and have a licensed well contractor inspect the well.
What is nitrate and why does it matter for babies?
The EPA standard for nitrate in drinking water is 10 mg/L (as nitrogen). The Department of Health says bottle-fed babies under six months old are at highest risk of methemoglobinemia, or blue baby syndrome, which can be serious. Nitrate cannot be tasted, smelled, or seen, and boiling makes it more concentrated. If an infant will drink the water, a nitrate test is the way to know where the well stands.
How common is arsenic in Minnesota well water?
The Department of Health says about 40 percent of Minnesota wells have arsenic in the water. It occurs naturally in rocks and soil, levels can differ between wells even within a small area, and you cannot taste, see, or smell it. The EPA limit for community water systems is 10 micrograms per liter. Only a lab test shows the arsenic level in a specific well.
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