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Well Water Testing · Stillwater, MN

Well Water Testing in Stillwater

Well water testing for homes on a private well across Minnesota. We collect the sample the right way and send it to an accredited laboratory for…

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Stillwater · Washington County

Well Water Testing in Stillwater

Well water testing for homes on a private well across Minnesota. We collect the sample the right way and send it to an accredited laboratory for coliform bacteria and E. coli, nitrate, arsenic, lead, manganese, 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. We also look at the visible wellhead, the pressure tank and the water treatment equipment during the home inspection.

Stillwater is a historic St. Croix River town with hillside Victorians and steep bluff lots. Housing here runs to hillside Victorians and historic riverfront homes, across the bluff neighborhoods above the St. Croix and the historic downtown.

Well water in Washington County

MDA's 2014-2015 township testing in Washington County covered Cottage Grove and Denmark. The final dataset held 441 wells with 15.0% at or over the 10 mg/L nitrate-nitrogen health risk limit. Cottage Grove (city) was 20.2% and Denmark 8.3%. MDA said Cottage Grove had more than 10% of wells over the limit. MDH lists coliform yearly, nitrate every other year, and arsenic and lead at least once. We test those and manganese, iron, hardness, pH, fluoride, sulfate and uranium through an accredited lab.

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

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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 do you test for?
Our lab panel covers coliform bacteria and E. coli, nitrate, arsenic, lead, manganese, 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. 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. Book it with the home inspection and we collect the sample the same visit, so the lab results arrive with time to act on them inside your inspection window.
Is nitrate high in Washington County wells?
In MDA's 2014-2015 testing, 15.0% of 441 wells were at or over 10 mg/L. Cottage Grove was 20.2% and Denmark 8.3%, so it depends on location. We test nitrate on an accredited report, and MDH lists it every other year, with arsenic and lead at least once. Coliform bacteria and E. coli are the pass-fail items lenders and buyers ask about first.
Are Stillwater's historic homes harder to inspect?
They demand experience with period construction and steep, erosion-prone lots — both of which we know well.
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