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Well Water Testing · Judson, MN

Water testing in Judson

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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Judson · Blue Earth County

Well Water Testing in Judson

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.

Judson is an unincorporated Minnesota River valley community of farmsteads and acreages west of Mankato. Housing here runs to farmsteads, acreages and river-valley homes, most on private wells and septic, across the Minnesota River valley bottom and the bluff-top farm ground along the Judson Bottom Road.

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

Well water in Blue Earth County

MDA's 2018 township testing in Blue Earth County covered five vulnerable townships and 642 tested wells, and 0.3% were over the 10 mg/L nitrate-nitrogen health standard. That is a low rate, but it is a township-scale sample, so your own well can differ. MDH says about 10 percent of Minnesota private wells exceed 10 ug/L arsenic, and levels can change a lot across short distances. MDH lists coliform yearly, nitrate every other year, and arsenic and lead at least once.

County facts checked September 2026 against: blueearthcountymn.gov, mda.state.mn.us, mda.state.mn.us, Minnesota Department of Health, Minnesota Department of Health.

Judson, MN water testing: well cap in the foreground, farmhouse behind it in central Minnesota lake country in winter snow
Nitrate: EPA limit 10 mg/L, highest risk to infants →
Private wells and water systems around Judson

MDH recommends testing a private well for coliform bacteria every year and nitrate every other year.

Well cap in the foreground, ranch home on acreage behind it in central Minnesota lake country in autumn color (Blue Earth County, Minnesota)
E. coli: a sign of fecal contamination →

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

Water tests available in Judson

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.

Judson 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.

Nitrate in Blue Earth County wells

0.3%

0.3% of 642 wells tested in five vulnerable townships were at or over the 10 mg/L nitrate standard (MDA township testing, 2018).

Source: Minnesota Department of Agriculture township testing

Township numbers are averages. Only a test of your own well tells you its nitrate level. Get a free instant quote

How long a private well lasts in Judson

0255075100+ years
25 to 50 years is common
100+ possible

Wells built before 1974, when Minnesota's well code began, are listed by MDH as higher risk for bacteria, along with leaking dug wells, wells in old frost pits and wells with corroded casings.

Source: Minnesota Department of Health

Wells built before 1974 often have no record on file. Test the water before you close. Get a free instant quote

Buying a home with a well in Judson: the disclosure rules

  1. Before the purchase agreementThe seller discloses in writing every known well and whether it is in use, not in use or sealed.
  2. At closingA well disclosure certificate is signed, unless the deed says the seller knows of no wells.
  3. If a well was hiddenA seller who knew of an undisclosed well can owe the sealing cost and attorney fees if the buyer sues within six years.
Source: Minnesota Statutes 103I.235

The disclosure tells you a well exists, not what is in it. Add water testing to your inspection. 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.
Are Blue Earth County wells high in nitrate?
In MDA's 2018 results for five townships, 0.3% of 642 wells tested over the 10 mg/L health standard. That is a sample of certain townships, not a guarantee for one property.
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 inspect acreages around Judson?
Yes — the Judson area is a short run west of our Mankato base. Nearly every property here is on a private well and septic, so both get flagged for the specialized testing they deserve; bottomland homes get the flood-history and water-table read, bluff-top homes get the slope-drainage read, and outbuildings are inspected on request. Our Mankato-based inspectors do the thermal imaging and mold testing here themselves, and Blue Earth County is Radon Zone 1.
How can I reduce lead in my tap water?
Run the tap for at least one minute before drinking or cooking if the water has sat for six hours or more, and use cold water for drinking, cooking, and formula. MDH lists carbon filters certified to remove lead, reverse osmosis, and distillation as treatment options. Replacing lead sources addresses the cause.
How often should I test my well for coliform bacteria in Minnesota?
MDH recommends testing private wells for coliform bacteria every year. It also recommends testing after any well work and after any change in the water's taste, smell, or appearance. Use an accredited laboratory, which can provide a sample container and instructions for collecting the sample.
What happens if the seller doesn't disclose a well?
Unless buyer and seller agree otherwise in writing before closing, a seller who fails to disclose a well, and knew or had reason to know of it, is liable to the buyer for the costs of sealing that well plus reasonable attorney fees. The buyer must act within six years after closing. The statute is Minnesota Statutes 103I.235, subdivision 2. Pipes, pits or wellhead hardware on the property can point to an undisclosed well worth raising with your agent.
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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