Duluth · Hermantown · Proctor · Cloquet
Radon mitigation in Duluth, MN
Tested high? Tell us what you need and we will connect you with a Minnesota-licensed radon contractor who serves your area.
- Licensed professionals only, as Minnesota law requires
- Help for failed tests in a home sale
- Systems, testing, fan repair and crawl spaces
Check your number
What does your radon test result mean?
The Environmental Protection Agency's action level is 4.0 picocuries per liter. It also suggests considering a fix between 2 and 4. Enter your result for the next step.
Type the number from your test report to see the next step, based on EPA guidance.
More than 1 in 4 properties tested in St. Louis County from 2016 to 2025 measured at or above the action level.
Minnesota Department of Health county test data. Results are voluntarily reported, and people who test are not a random sample of homes. How to read this
Radon services around Duluth
Radon Mitigation
Sub-slab systems that pull radon from under the basement floor and vent it above the roof.
Radon Testing
Short-term and long-term testing, and how to read the number you get back.
Mitigation Cost
The Minnesota Department of Health puts typical systems at $1,500 to $3,000.
Buying or Selling
Failed test and a closing date? What buyers, sellers and agents need to do.
Fan Repair
Warning alarm, zeroed-out gauge or a loud rattle? Diagnosing and replacing a radon fan.
Crawl Spaces
Membrane systems for crawl spaces, and homes that mix a basement with a crawl.
Well Water
Homes on private wells around Duluth: testing water, and treatment options.
Radon Levels
What Minnesota's test data says about St. Louis County, and why winter matters.
Why radon is a real issue in Duluth homes
Radon is a radioactive gas that forms naturally in soil. It has no color, smell or taste. EPA estimates it causes about 21,000 lung cancer deaths a year in the United States, which makes it the second leading cause after smoking. The Minnesota Department of Health reports a statewide average of 3.8 pCi/L for 2016 to 2025, about three times the U.S. average.
Long winters are part of the reason. When a furnace runs and warm air rises, the bottom of the house ends up at slightly lower pressure than the ground around it, and soil gas is drawn in through slab cracks, sump pits, drain tile and block walls. Duluth's mix of older basements, hillside lots and homes with additions means that houses on the same block can test very differently.
How a system fixes it
Most homes need a sub-slab suction system: a pipe through the basement floor, connected to a fan that runs all the time and vents above the roof. Minnesota requires the fan to be outside the living space and the pipe to end above the edge of the roof. Homes with drain tile may use it as the suction point, and crawl spaces get a sealed membrane. After the system has run for at least 24 hours, a follow-up test confirms that it worked. Read the full guide.
What it costs
The Minnesota Department of Health says systems generally cost $1,500 to $3,000, depending on the system and how the home was built. See what changes the price.
Who can do the work
Minnesota requires a state license for anyone performing radon mitigation or testing in a building they do not own or lease. Licensed installers must tag each finished system, and the state offers free inspections of systems professionally installed in existing buildings since June 1, 2020.
How this works
Tell us about your home
Share your reading, or your closing date if you are buying or selling.
We pass it to a licensed contractor
Your request goes to a Minnesota-licensed radon professional serving your area.
You get a quote directly
The contractor contacts you. Whether to hire them is entirely up to you.
Common questions
Are you a radon contractor?
No. We are an independent referral service. We connect homeowners around Duluth with Minnesota-licensed radon professionals, who quote and perform the work and are responsible for it.
Does it cost anything to request a quote?
Asking through this site costs you nothing. Any charge for testing or installation is between you and the contractor, so ask for the price in writing.
What radon level is dangerous?
EPA's action level is 4.0 pCi/L, and it suggests considering a fix between 2 and 4 pCi/L. There is no known safe level, and risk rises with both the level and the length of exposure.
How common is high radon around Duluth?
About 27% of properties tested in St. Louis County from 2016 to 2025 measured 4.0 pCi/L or higher. Statewide, the Minnesota Department of Health says 2 in 5 homes tested have radon at levels that are a major health risk.
What areas do you cover?
Duluth, Hermantown, Proctor, Cloquet, Esko, Carlton, Two Harbors and nearby communities in St. Louis, Carlton and Lake counties in Minnesota.