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Radon Testing in a Watertown, MN home
⬥ Watertown, MN · InterNACHI Master Certified

Radon testing in Watertown, MN — the gas you can't see.

This Carver County Crow River town sits in Minnesota's high-radon region. A continuous-monitor radon test tells you exactly what's in the air on the lowest level of a Watertown home — whether it's a century-old downtown basement or a brand-new lower level.

★★★★★ 5-star rated✓ Continuous radon monitor✓ Bundle with your inspection
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Get your free Watertown radon testing quote & book online.

Answer a few quick questions, get your free quote now, and pick a time. Radon testing is most affordable bundled with your inspection.

What It Is

A precise measurement of Watertown's air, not a guess.

Radon is a colorless, odorless radioactive gas that rises from the soil and enters homes through foundation cracks, sump pits, and floor-wall joints. We measure it with a continuous radon monitor placed on the lowest livable level under closed-house conditions, recording hourly readings over at least 48 hours.

Results are reported in picocuries per liter (pCi/L) and compared against the EPA action level of 4.0 pCi/L. It's a quick, valuable add-on to a full home inspection. Learn more about radon testing or about home inspection in Watertown, MN.

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Poured concrete basement foundation where radon can enter a Watertown, MN home
Why It Matters in Watertown

Old or new, radon doesn't care.

Watertown straddles the Crow River in Carver County, with a charming historic downtown on one side and growing new developments on the other. Radon collects in both the deep stone-and-block basements downtown and the tightly sealed lower levels of new construction — and a new home is no safer than an old one.

Radon test manometer on a radon mitigation pipe
Entry Points

Sump pits & floor joints

Radon enters through sump pits, foundation cracks, and floor-wall joints — common in Watertown's river-adjacent basements where water management is a constant.

Basement foundation where radon levels are measured in Watertown, MN
Geology

High-radon soils

Watertown sits in Carver County's high-radon region, where the glacial soils beneath the Crow River valley carry radon gas up into the homes above.

Finished basement living space where radon is a concern in Watertown
New Construction

Tight new lower levels

Watertown's new builds are sealed tight for efficiency, which can trap radon at higher levels in finished lower-level living space if it goes untested.

What's Included

What the Watertown radon test covers.

Continuous Monitor

A professional continuous radon monitor that records hourly readings, not a single passive snapshot.

Proper Placement

Placement on the lowest livable level under closed-house conditions, following EPA testing protocol.

48+ Hour Test

A minimum 48-hour measurement period for an accurate, averaged result you can trust.

pCi/L Results

Results reported in picocuries per liter and compared against the EPA action level of 4.0 pCi/L.

Tamper Awareness

Hourly logging that flags disturbances or open-house conditions affecting the reading.

Clear Guidance

Plain-language explanation of your result and what it means for mitigation, included in your report.

How It Works

Accurate Watertown results, simply explained.

01

Get your free quote

Use the calculator above to get your instant quote and book the test online.

02

We place the monitor

The continuous monitor is set on the lowest livable level under closed-house conditions.

03

48-hour measurement

The monitor logs hourly readings for at least 48 hours for an accurate average.

04

Get your result

Your pCi/L result and clear next steps delivered in your report, fast.

FAQ

Radon testing questions for Watertown, answered.

What is radon and why is it dangerous?
Radon is a colorless, odorless radioactive gas that rises from the soil and seeps into homes through foundations. It is the leading cause of lung cancer among non-smokers in the United States. Because you cannot see or smell it, testing is the only way to know whether a home has a problem.
Do I need a radon test in Watertown, MN?
Yes. The Minnesota Department of Health reports that more than two in five Minnesota homes test above the EPA action level. Watertown sits in Carver County's high-radon region, and radon affects both its century-old downtown basements and its brand-new subdivision lower levels — a new, tightly sealed home is just as likely to test high as an old one. Levels vary house to house regardless of age, so the only way to know your Watertown home's level is to test it.
How is radon testing done?
We place a continuous radon monitor on the lowest livable level of the home, typically the basement, under closed-house conditions for a minimum of 48 hours. The monitor records hourly readings, which we average and report in picocuries per liter and compare against the EPA action level of 4.0 pCi/L.
How much does radon testing cost?
Radon testing is affordable on its own and even more so bundled with your home inspection. Use the free instant quote tool on this page to see your exact price in about two minutes and book a time.
What happens if radon levels are high?
If your result is at or above 4.0 pCi/L, the EPA recommends installing a radon mitigation system. These systems vent radon from beneath the foundation to the outside and are highly effective. Your report explains the result clearly so you can plan your next step.

Related services & service area

Pair radon testing with a full home inspection, a sewer scope, or mold testing, or learn more about home inspection in Watertown, MN. We serve Watertown and the surrounding Carver and Wright County communities.

You can't see radon. Test for it in Watertown.

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