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Well Water Testing · Oak Grove, MN

Water testing in Oak Grove

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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Oak Grove · Anoka County

Well Water Testing in Oak Grove

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.

Oak Grove is a rural-residential city of acreage homes along the Rum River. Housing here runs to rural-residential homes on large lots, across the acreage parcels along the Rum River and Cedar Creek.

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

Well water in Anoka County

MDA's township testing schedule lists no Anoka County report, so there is no county nitrate percentage to quote. MDH says shallow wells and wells in sand aquifers are the ones most exposed to nitrate, and that arsenic is elevated in central and west-central Minnesota and can differ sharply between neighboring wells because of glacial geology. MDH lists coliform bacteria yearly, nitrate every other year, and arsenic and lead at least once. Our lab panel covers coliform/E. coli, nitrate, arsenic, lead, manganese, iron, hardness, pH, fluoride, sulfate, uranium, VOCs and DRO (diesel range organics).

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

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

Water tests available in Oak Grove

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.

Oak Grove 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.

Well water around Oak Grove, Anoka County

Oak Grove, MN water testing: well cap in the foreground, 1970s rambler behind it on the edge of the Twin Cities suburbs in winter snow
Coliform bacteria: MDH recommends testing every year →
Well cap in the foreground, modern farmhouse with black windows behind it on the edge of the Twin Cities suburbs in winter snow (Anoka County, Minnesota)
Nitrate: EPA limit 10 mg/L, highest risk to infants →
Oak Grove, MN water testing: well cap in the foreground, farmhouse behind it in the Minnesota River valley in winter snow
VOCs: fuels, solvents and degreasers →

Arsenic in Oak Grove 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 Oak Grove

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 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.
Is there county nitrate data for wells in Anoka County?
MDA's township testing program has not published a county report for Anoka County, so there is no county percentage to quote. MDH says shallow wells and wells in sand aquifers are most exposed to nitrate.
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 Oak Grove hobby farms?
Yes — acreage properties here usually add wells, septic and outbuildings to the inspection, and river-adjacent lots get a close look at grading and seasonal water.
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.
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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