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Well Water Testing · Lester Prairie, MN

Water testing in Lester Prairie

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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Lester Prairie · McLeod County

Well Water Testing in Lester Prairie

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 year, and arsenic and lead at least once.

Lester Prairie is a small Crow River town of older homes and modest new growth. Housing here runs to older homes with modest new growth, across the Crow River core and the newer edge.

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

Well water in McLeod County

McLeod County has no township nitrate report on MDA's results list, so no county-specific figure is available to quote here. What MDH does say applies statewide: arsenic is in groundwater everywhere, found in about 40 percent of new wells since 2008, and about 10 percent of private wells exceed 10 µg/L. MDH also says manganese is natural in Minnesota groundwater, and 100 µg/L is its safe level for infant formula. Nitrate and coliform bacteria are the yearly and every-other-year checks.coli, nitrate, arsenic, lead, manganese, iron, hardness, pH, fluoride, sulfate, uranium, VOCs and DRO (diesel range organics) through an accredited lab.

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

Home inspection in Lester Prairie →  ·  More about well water testing →  ·  Every water test, explained →

Pairs well with:

Septic inspection in Lester PrairieRadon testing in Lester PrairieSewer scope in Lester Prairie

Water tests available in Lester Prairie

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. Compare your lab results with these values.

Lester Prairie private well testing timeline

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

When to test your water

  • Every yearColiform bacteria and nitrate, the basic safety checks for a private well. Nitrate can come from fertilizer, septic systems and animal waste.
  • At least onceArsenic and lead. Arsenic can differ even between neighboring wells.
  • Before a baby drinks the waterColiform bacteria, nitrate, arsenic, lead and manganese. MDH recommends testing a private well for all five before a baby drinks the water.
  • When you buy a homeA full baseline while you can still ask questions or negotiate.
  • After flooding or well workFlooding and repairs to the well are reasons to test again.
  • When taste, color or smell changesMDH says a change in taste, smell or look is a reason to test for coliform bacteria.
  • Near a fuel tank or industrial siteVOCs, plus DRO for diesel and heating oil. MDH says to consider a VOC test if the well is near fuel tanks or a commercial or industrial area.
  • City water in an older homeLead. MDH says homes built before 1940 may have lead service lines, and plumbing parts made before 1986 may contain lead.

Based on: MDH well testing, MDH coliform bacteria, MDH nitrate, MDH water for babies, MDH flood precautions, MDH lead.

How to get it done

  1. Choose your testsPick the water testing you need in the free instant quote.
  2. Pick a timeBook online. The quote takes about 30 seconds.
  3. Get certified lab resultsA certified laboratory analyzes the water and reports each result.

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Water testing in Lester Prairie: what matters

Lester Prairie, MN water testing: faucet aerator close-up with clear water in a modern white Minnesota kitchen
Lead: MDH says no level is safe →
Prep sink with running water in a Minnesota farmhouse kitchen (McLeod County, Minnesota)
Nitrate: EPA limit 10 mg/L, highest risk to infants →
Lester Prairie, MN water testing: refrigerator water dispenser filling a glass in a modern white Minnesota kitchen
DRO: a screen for diesel and heating-oil petroleum →

How deep Lester Prairie 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 Lester Prairie 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 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.
Which well tests matter most for a McLeod County home?
Follow MDH: coliform bacteria every year, nitrate every year, and arsenic and lead at least once. Add manganese, since MDH gives 100 µg/L as the safe level for infant formula. MDH says arsenic is found statewide, so a county without a published map result still needs a test. Buyers should test at inspection, not after closing.
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 Lester Prairie?
Yes — both the older river-town stock and the newer builds get a full inspection.
What does DRO mean in a water test?
DRO means diesel range organics. In Minnesota petroleum cleanup work, MPCA runs DRO and gasoline range organics (GRO) as part of the investigation to determine whether a water plume is a mixture of petroleum products. It is a screening and investigative result, not a measure of health risk.
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.
Do I need to test my well after a flood?
Yes. The Department of Health says if flood water reached your well or covered the casing top, assume it is contaminated and do not use it for drinking, cooking, or brushing teeth until disinfection and a negative coliform test. If flood water came within 50 feet but did not reach the well, testing is advised as a precaution. A coliform test is the step that confirms the water after flooding.
How can I tell if there is a forgotten well on my property?
The Department of Health suggests looking for a pipe 1 to 8 inches wide at, above, or below the surface, a low spot or sunken area, a metal, wood, or concrete cover, a windmill or old well house, and a concrete patch or glass block in a basement step or floor. Well pits and basement offsets are other common signs. Visible signs like these are worth raising with your agent and a licensed well contractor.
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