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Well Water Testing · Darwin, MN

Water testing in Darwin

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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Darwin · Meeker County

Well Water Testing in Darwin

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.

Darwin is a Highway 12 railroad town on the BNSF line, platted in 1869, home of a famous ball of twine. Housing here runs to older railroad-town houses, mid-century homes and houses near the lakes, in a city of 348 people, across the Highway 12 townsite, the BNSF line, the Twine Ball Museum blocks, and the shore of Turtle Lake.

Darwin is served by our Big Lake team →  ·  (612) 457-1634

Well water in Meeker County

MDA's 2018 township testing in Meeker County covered two vulnerable townships and 245 wells, and 2.0% were over the 10 mg/L nitrate-nitrogen health standard. A low township-scale rate does not clear any single well. MDH says arsenic is elevated in central and west-central Minnesota and can differ sharply between neighbors because of glacial geology, and it lists coliform yearly, nitrate every year, and arsenic and lead at least once.

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

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

Pairs well with:

Septic inspection in DarwinRadon testing in DarwinSewer scope in Darwin

Water tests available in Darwin

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.

Darwin 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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Well water around Darwin, Meeker County

Darwin, MN water testing: well cap in the foreground, ranch home on acreage behind it in central Minnesota lake country in summer
Nitrate: EPA limit 10 mg/L, highest risk to infants →
Well cap in the foreground, older brick country home behind it on the southwestern Minnesota prairie in autumn color (Meeker County, Minnesota)
Coliform bacteria: MDH recommends testing every year →
Darwin, MN water testing: well cap in the foreground, split-level home on a wooded lot behind it in central Minnesota lake country in summer
VOCs: fuels, solvents and degreasers →

Nitrate in Meeker County wells

2%

2% of 245 wells tested in two 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

Arsenic in Darwin 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

How long a private well lasts in Darwin

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

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.
How common is high nitrate in Meeker County wells?
MDA's 2018 initial sampling of two townships found 2.0% of 245 wells over the 10 mg/L health standard. That is low, but it describes townships, not your well. MDH recommends testing for coliform bacteria every year.
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 the lakes and the BNSF line around Darwin affect a home inspection?
Darwin was platted in 1869 along the St. Paul and Pacific Railroad, and the BNSF main line still runs through town alongside U.S. Highway 12. Turtle Lake lies partly inside the city along its eastern border, with Lake Darwin just outside the southeast corner. Houses near the tracks and highway are worth checking for vibration cracking, older foundations and worn roofs. Those near the lake need a look at grading, sump pump operation and basement moisture. Meeker County is EPA Radon Zone 1, and small-town homes here often have a private well or older septic to confirm.
What are VOCs in well water?
VOCs, or volatile organic compounds, are a group of organic chemicals found in products such as paints, solvents, pesticides, and petroleum products. EPA notes they can reach private wells through waste disposal, spills, and runoff. A laboratory test is the only way to find out whether any are in your well.
What is the safe level of arsenic in drinking water?
The EPA standard is 10 µg/L, equal to 10 parts per billion, though the EPA health goal is 0. MDH highly recommends taking action if a private well is above 10 µg/L, and notes that levels below the standard can still increase cancer risk over many years.
How far must a well be from a fuel tank, feedlot, or manure storage?
Minnesota Rules 4725.4450 sets, for example, 150 feet from a tank holding 1,100 gallons or more of unprotected petroleum, 100 feet from an unroofed feedlot of 300 or more animal units, and 50 feet from an animal feedlot or animal building with more than one animal unit. Sensitive wells have larger distances. If a fuel tank or feedlot is near the wellhead, MDH says to consider testing for volatile organic chemicals or area agricultural chemicals.
Does the well disclosure apply to sand-point and dug wells too?
Yes. The Minnesota Department of Health says the disclosure law covers all types of wells, whether used for drinking water, irrigation, livestock, heating or cooling, or monitoring. That includes drive-point (sand-point) wells, drilled wells, and dug wells. The law is Minnesota Statutes section 103I.235, part of the Ground Water Protection Act. Ask for the disclosure early, then have the in-use well tested before closing.
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